Question

a body moves from p to q with uniform speed of 30 km/h and returned back with a speed of 40 km /h?find its average speed

Answer 1

Average speed = Total distance/ Total time.

But since, two speeds are already given,

Average speed = Sum of speeds/ Number of given speeds

= (40km/h + 30km/h)/ 2

= 70km/h/2

= 35 km/h

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