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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

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 Correct Answer 72

Solution:Let the time taken for one question be xThen math question takes 2xRemaining questions other than math questions are 150then time taken for the remaining questions is 150xTime taken to solve math questions = 50 × 2x = 100x100x + 150x = 3 × 60250x = 180x = 180/250Then time taken for math problems = 2 × 180/250 × 50 = 72minute

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