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A motorcycle drives from A to …

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A motorcycle drives from A to B with the uniform speed of 30km/hr and returns back with a speed of 20km/hr. Find its average speed

Posted by Samruddhi Parik 2 years ago

CBSE > Class 09 > Science

2 answers

Nandini Kushwaha 1 year, 11 months ago

Average velocity is = u+v\2 Therefore, =30+20\2 =50\2 =25km\hr ans..... (:

Sadaf Nasim 2 years ago

Let the distance from A to B = x km Total dist. = x+x = 2x km Time = dist./ speed Time taken from A to B = x km / 30 km/ hr Time taken from B to A = x km / 20 km/ hr Total time = x/30 + x/20 = 2x + 3x/60 = 5x/60 Average speed = 2x/5x/60 = 2x × 60/5x = 2×12 = 24 km/ hr

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