Two cars A and B race each other. The Car A ran for 2 minute at a speed of 7.5 km/h, slept for 56 minute and again ran for 2 minute at a speed of 7.5 km/h. find the average speed of the car A in the race.

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Solution

Dear Student
$s p e e d = 7.5 k m / h = 0.125 k m / m i n d i s \tan c e t r a v e l l e d = s p e e d \times t i m e = 0.125 \times 2 = 0.25 m A v e r a g e s p e e d = \frac{t o t a l d i s \tan c e t r a v e l l e d}{t o t a l t i m e t a k e n} = \frac{2 \times 0.25}{56 + 2 + 2} = 0.00833 k m / m i n = 0.5 k m / h$

Regards

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Two cars A and B race each other. The Car A ran for 2 minute at a speed of 7.5 km/h, slept for 56 minute and again ran for 2 minute at a speed of 7.5 km/h. find the average speed of the car A in the race.

Dear Student speed = 7.5 km / h = 0.125km/mindistance travelled = speed×time = 0.125×2 = 0.25 mAverage speed = total distance travelledtotal time taken= 2×0.2556+2+2 = 0.00833 km/min = 0.5 km/h Regards