Ali can finish a task in 6 hours, and Ahmed can finish it in 12 hours. Ahmed works alone for 2 hours, then both work together. How long does the whole task take?
Correct answer: B. 5 1/3 hours
- A. 4 2/3 hours
- B. 5 1/3 hours
- C. 5 2/3 hours
- D. 6 1/3 hours
Explanation
Ahmed completes 2/12 = 1/6 of the task in 2 hours. Together they complete 1/6 + 1/12 = 1/4 per hour, so the remaining 5/6 takes 10/3 hours. The total is 2 + 10/3 = 5 1/3 hours.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Quantitative Reasoning
Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
Practise Quantitative Reasoning
585 free Quantitative Reasoning MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Quantitative Reasoning questions
Ali has three times as many marbles as Bilal. Ali gives 8 marbles to Bilal, and then they have equal numbers. How many marbles did they have altogether at first?
The average of 5 scores is 18. Four of the scores total 65. What is the fifth score?
What is the smaller angle between the hands of a clock at 2:40?
At exactly 4:00, how many minutes after 4:00 will the clock hands next overlap?
How many numbers from 1 through 100 are divisible by 3 or by 5, but not by both?
A store has 37 notebooks. It sells 18 notebooks. How many notebooks remain?