Question

Raj takes 1/2 hours to complete his homework .However Seema takes 8/3 hours to complete her homework .Who take less time and by how much​?

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Answer 1

Time taken for Homework,

By Raj 2 whole 1/4 hours = 9 / 4 hours

By Seema = 8/3 hours

Comparison -

Raj = 9/4 = (9 x 3) / (4 x 3) = 27/12

Seema = 8/3 = (8 x 4) / (3 x 4) = 32/12

Clearly, (27/12) < (32/12)

Hence, Raj took less time.

By How much -

(32/12) - (27/12) hours

= (32-27)/ 12 hours

= (5/12) hours

Hence, Raj took less time to complete his homework by (5/12) hours

Answer 2

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