A man is riding on a cycle with velocity 7.2 km/hr up a hill having a slope 1 in 20. The total mass of the man and cycle is 100 kg. The power of the man is (in W)

v=7.2kmh=7.2×518=2 m​/​sSlope is given 1 in 20 ∴sinθ=120When man and cycle moves up then component of weight opposes it motion  i.e.  F=mgsinθSo power of the man P=F×v=mgsinθ×v=100×9.8×120×2=98 W