Question

A car travels at 54 km/h for first 20 s, 36km/h for next 30 s, and finally 18km/h for next 10 s. Find its average speed

Answer 1

Answer:

distance covered in first 20 sec is 54 × 5/18 × 20 = 300 m

distance covered in next 30 sec is 36 × 5/18 × 30 = 300 m

distance covered in next 10 sec is 18 × 5/18 × 10 = 50 m

average speed = total distance/total time = 650/60 = 10.84 m/s

#BAL

Answer 2

Explanation:

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