A particle travels along the curve from A to B in 2 s. It takes 4 s for it to […]

# average speed

A car moves uphill at 40 km/h and then back downhill at 60 km/h.What is the average speed for the […]

A particle travels along the curve from A to B in 2 s. It takes 4 s for it to […]

A car moves uphill at 40 km/h and then back downhill at 60 km/h.What is the average speed for the […]

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