. There are 40 minutes to solve a test of 60 questions. A student completes 20 questions in 20 minutes He continues with the same speed and leaves the hall 10 minutes earlier. The number of questions solved by him?
. There are 40 minutes to solve a test of 60 questions. A student completes 20 questions in 20 minutes He continues with the same speed and leaves the hall 10 minutes earlier. The number of questions solved by him?
Explanation
He solved one question in one minute.
This is if he continued at the speed and there are 40 minutes to solve the test and he left 10 minutes earlier.
He is left with 30 minutes and one minute per question.
Therefore, he solved 30 questions.
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ND17-1-2023