BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . There are 200 questions on a 3-hour examination . Among these questions 50 are mathematics problems. It is suggested that twice as much time be spent on each math problem as for each other question. How many minutes should be spent on mathematics problem

A. 32
B. 72
C. 60
D. 100
D. None of these

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Answer: Option B

Explanation:

Solution:

Let the time taken for one question be x

Then math question takes 2x

Remaining questions other than math questions are 150

then time taken for the remaining questions is 150x

Time taken to solve math questions = 50 × 2x = 100x

100x + 150x = 3 × 60

250x = 180

x = 180/250

Then time taken for math problems = 2 × 180/250 × 50 = 72 minute .

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Bangladesh Bank - Assistant Director - 2009

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