Walking at 3/4 of his usual speed ,a man is late by 2 1/2 hr. the usual time is
7
7 1/2
8 1/2
8
Explanation:
Usual speed = S Usual time = T Distance = D New Speed is 3/4=> S New time is 4/3 T=> 4/3 T - T = 5/2 T=15/2 = 7 1/2
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