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If Karan solve 20 questions in 10 minutes and Bhavik solves 50 questions in 10 minutes.In how many minutes both will solve 91 questions?

If Karan solve 20 questions in 10 minutes and Bhavik solves 50 questions in 10 minutes.In how many minutes both will solve 91 questions? Correct Answer 13 minutes

Given

Number of questions solved by Karan in 10 minutes = 20

Number of questions solved by Bhavik in 10 minutes = 50

Calculation

Karan solve questions in 1 minute = 20/10 = 2

Bhavik solve questions in 1 minute = 50/10 = 5

Karan and Bhavik solve questions in 1 minute together = 2 + 5 = 7

91 questions were solved by them in 91/7 = 13 minutes

∴ 91 questions solved by Karan and Bhavik in 13 minutes

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