Sarthaks Test
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A person of mass 60 kg wants to lose 5kg by going up and down a 10m high stairs. Assume he burns twice as much fat while going up than coming down. If 1 kg of fat is burnt on expending 7000 kilo calories, how many times must he go up and down to reduce his weight by 5 kg?

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5 x 7000 x 103 4.2J = 60 x 15 x 10 x N

N = (21 x 7 x 106/900) = (147/9) x 103 = 16.3 x 103 times.

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