Ratio and Performance

Ratio and Performance

Postby Guest » Mon Jan 07, 2019 9:02 am

kindly help in understanding the answer to this problem. What is the logic behind this answer.

A boy and three girls do as many sums in 5 minutes as 3 boys and 5 girls do in 4 minutes. Who works faster?
a. neither
b. girls
c. both equal
d. boys

correct answer as it is given is 'b' i.e. girls


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