Alok worked on a set of mathematics problems for 20 minutes and finished 4/15 of it.He then called Asha.Working together,they finished the complete set in 22 minutes .How long would alok and asha working alone have taken to finish the set .
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Alok has taken 20 mins to solve 4/15 problems. Then he needs 5 mins to solve a single problem.
Asha comes and helps to solve the left 11/15 problems in 22 mins together. Each problem is given 2 mins. The effort (5 mins) of each math of Alok is reduced by Asha by 3 mins, i.e., 5-2=3.
So Asha can solve a single math in 3 mins.
So, Alok would take 75 mins to solve the complete set alone and Asha alone would take 45 mins to solve the whole set.
Asha comes and helps to solve the left 11/15 problems in 22 mins together. Each problem is given 2 mins. The effort (5 mins) of each math of Alok is reduced by Asha by 3 mins, i.e., 5-2=3.
So Asha can solve a single math in 3 mins.
So, Alok would take 75 mins to solve the complete set alone and Asha alone would take 45 mins to solve the whole set.
atiksh10:
thank you. but according to the textbook asha takes 50 min
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