Question

A boy increases his speed to 9/5 times of his original speed.By this he reaches his school 30 minutes before the usual time.How much time does he takes usually?

Answer 1

Answer is 54 minutes

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• 30/1

• 9 x 30 = 270

---------. -----

• 5 x 1 = 5

• 270

------ = 54

5