1.

A man covers a certain distance with a uniform speed of x km/h. Had he moved 4 km/h faster, he would have taken 30 minutes less. If he had moved 3 km/h slower, he would have taken 30 minutes more. Fin

Answer»

24 km/hr



Let the DISTANCE be D km
and the INITIAL SPEED be X km/hr
we have D/x+4 = D/x - 30/60



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