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Question

If Anil goes the school from his home by an average speed of 5 km/h, he reaches there at the correct time. If however his average speed is 4 km/h, he reaches there 15 min late. Find the distance of the school from his home ?

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Solution

Let distance between school and home=xkm.

Time taken to reach school at 4kmhr=x4hrs.

Time taken to reach school at 5kmhr=x5hrs.

x41560=x5

x4x5=1560

5x4x20=14

5x4x=204

x=5

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