Maria and John start cycling toward each other from two points, A and B, respectively. Keeping in mind that John passes through B 1 hour earlier than Maria passes through A. The distance between A and B is 60 kilometers. Maria’s cycling pace is 15 kilometers per hour, while Juan’s is 20 kilometers per hour. How far did John travel when they met?
A. 24
B. 30
C. 36
D. 40
E. 45
Answer:
Let t represent the number of hours John cycled when they met. At that point, John has covered a (...)
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Mixtures Proportions Ratio GMAT QUANT

Maria and John start cycling toward each other from two points, A and B, respectively. Keeping in mind that John passes through B 1 hour earlier than Maria passes through A. The distance between A and B is 60 kilometers. Maria’s cycling pace is 15 kilometers per hour, while Juan’s is 20 kilometers per hour. How far did John travel when they met?
31 March, by hurtado claudio 
Fanny and Alexander are 360 miles apart and are both traveling towards each other in a straight line. Fanny is traveling at a constant rate of 25 miles per hour, while Alexander is traveling at a constant rate of 65 miles per hour. How far apart will they be exactly 1.5 hours before they meet?
25 October 2023, by hurtado claudioGMAT QUANTITATIVE QUESTION Problem Solving Word Problems , Mixtures Proportions Ratio GMAT QUANT

40% of a club’s revenue comes from people of 25 years of age while 60% of its revenue comes from people of 35 years of age. If the club raises its fee by 20% for its 25 years old members and 30% for 35 years old members, what is the percentage increase in overall revenue of the club?
15 February 2022, by hurtado claudioGMAT QUANT Problem Solving Level 600 700, Mixtures proportions ratios
40% of a club’s revenue comes from people of 25 years of age while 60% of its revenue comes from people of 35 years of age. If the club raises its fee by 20% for its 25 years old members and 30% for 35 years old members, what is the percentage increase in overall revenue of the club?
a. 26%
b. 25%
c. 24%
d. 23%
e. 20% 
A grocer has 400 pounds of coffee in stock, 20 percent of which is decaffeinated. If the grocer buys another 100 pounds of coffee of which 60 percent is decaffeinated, what percent, by weight, of the grocer’s stock of coffee is decaffeinated?
15 February 2022, by hurtado claudioGMAT QUANT Problem Solving Level 600 700 , Mixtures proportions ratios
A grocer has 400 pounds of coffee in stock, 20 percent of which is decaffeinated. If the grocer buys another 100 pounds of coffee of which 60 percent is decaffeinated, what percent, by weight, of the grocer’s stock of coffee is decaffeinated?
A. 28%
B. 30%
C. 32%
D. 34%
E. 40% 
We have 100 ml of hot water (at temperature x°C) and 200 ml of water at 48°C. What is the temperature of hot water x°C when the resulting mixture has a temperature of 65°C?
15 February 2022, by hurtado claudioGMAT QUANT Problem Solving Level 500 600 Mixtures proportions ratio
We have 100 ml of hot water (at temperature x°C) and 200 ml of water at 48°C. What is the temperature of hot water x°C when the resulting mixture has a temperature of 65°C?
A) 38°C
B) 48°C
C) 58°C
D) 66°C
E) 99°C 
How many liters of chlorine must be added to a 500liter solution that is 20% chlorine to produce a solution that is 30% chlorine?
14 February 2022, by hurtado claudioHow many liters of chlorine must be added to a 500liter solution that is 20% chlorine to produce a solution that is 30% chlorine?
A) 40
B) 59
C) 100
D) 49
E) 70 
You have 5 tons of a certain mineral A costing $5,000, 20 tons of another mineral B costing $10,000, and 10 tons of a third mineral C costing $20,000. By mixing the three minerals, a new material is obtained that costs $1,500 per ton. Considering that in the mixture the participation of B is double that of A, in what percentage is C present in the mixture?
14 February 2022, by hurtado claudioMixtures proportions Ratio Problems Solving Level 600 700
You have 5 tons of a certain mineral A costing $5,000, 20 tons of another mineral B costing $10,000, and 10 tons of a third mineral C costing $20,000.
By mixing the three minerals, a new material is obtained that costs $1,500 per ton.
Considering that in the mixture the participation of B is double that of A, in what percentage is C present in the mixture?
A) Less than 50%
B) Between 50% and 62.5%
C) 55%
D) 72.5%
E) 62.5% 
Premium tea is $0.6 per ounce and super premium tea is $0.9 per ounce. If the mix of premium and super premium costs $7 for 10 ounces, what is the approximate share of super premium in this mix?
14 February 2022, by hurtado claudioRatio Mixtures Problem Solving, level 500 600
Premium tea is $0.6 per ounce and super premium tea is $0.9 per ounce. If the mix of premium and super premium costs $7 for 10 ounces, what is the approximate share of super premium in this mix?
A) 51%
B) Less than 50%
C) 60%
D) 70%
E) 55% 
The average sales for the year 2021 was 540,000 dollars, if in 4 months of that year the average sale was 200,000, what was the average sale for the other months of that year?
14 February 2022, by hurtado claudioProportions Ratios Mixture. Word Problems
The average sales for the year 2021 was 540,000 dollars, if in 4 months of that year the average sale was 200,000, what was the average sale, in dollars, of the other months of that year?
A) 640.000
B) 280.000
C) 540.000
D) 200.000
E) 710.000 
A group of friends has 10 boys and 20 girls. Average age of boys is 20 years and average age of girls is 17 years. What is the average age of the group?
14 February 2022, by hurtado claudioweighted average, Ratio. Word Problems Solving.
A group of friends has 10 boys and 20 girls. Average age of boys is 20 years and average age of girls is 17 years. What is the average age of the group?
A) 410/20
B) 20
C) 17
D) Apple
E) 21