a boy goes from his house to school by bus at a speed of 20 km/h and returns back through same route at a speed of 30 km/h. find average speed
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average speed = (S1 +S2 )÷2
Here, S1 = 20 km/ hr.andS2= 30km/hr.
so., average speed= (30+ 20 )÷2
=25 km/hr.
Here, S1 = 20 km/ hr.andS2= 30km/hr.
so., average speed= (30+ 20 )÷2
=25 km/hr.
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