Q

A 50 kg boy climbs 45 stairs in 9 seconds. Each stair is 15 cm high. Find his power. (g = 10 m/s²)

RRB Group D 22/09/2018 / Shift-I 2018
✓ Answer: D 375 W
h = 45 × 0.15 = 6.75 m. P = 50 × 10 × 6.75/9 = 375 W.
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