A 60 kg man runs up a staircase in 12 seconds while a 50 kg man runs u – McqOptions

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1.	A 60 kg man runs up a staircase in 12 seconds while a 50 kg man runs up the same staircase in 11, seconds, the ratio of the rate of doing their work is [AMU (Engg.) 2001]
A.	6 : 5
B.	12 : 11
C.	11 : 10
D.	10 : 11
Answer» D. 10 : 11

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