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  • Find the average speed of a body if it covers 300 km with a speed of 30 km/h and next 300 km with a speed of 50 km/h.

Find the average speed of a body if it covers 300 km with a speed of 30 km/h and next 300 km with a speed of 50 km/h.

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The first 300 km covered at a speed of 30 km/hr, so the time taken = 300/30 = 10 hr.

The next 300 km covered at a speed of 50 km/h, so the time taken = 300/50 = 6 hr.

So average speed = Total distance covered/Total time = 600 km/16 hr  = 37.5 km/hr.

 

Posted by

shubham.krishnan

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