If a pavan walks at 3/8th of his usual speed he reaches 20 min late.if he walks at this usual speed how much time does he travels?

40 min

30 min

60 min

100 min

A pavan walks 3/8th of his usual speed.he reaches 20 minlate.If he walks his usual speed how much time he takes 3* 20=60 min

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