Question

car travelling with 60km/hr for 1 km and 40km/hr for next 1 km. find the average sopeed of the car.

Answer 1

D₁ = 1 km

S₁ = 60 km/h

T₁ = D₁/S₁ = 1/60 hr = 1min

D₂ = 1 Km

S₂ = 40 Km/h

T₂ = D₂/S₂ = 1/40 h

Total time = 1/60 + 1/40 = 100/2400 = 1/24h

Avg speed = D/T

= 2 / 1/24

= 2*24 = 48 Km/h

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