41ˢ B.P.S.C. (Pre) 1996

While walking at $\frac{3}{4}$ of his normal rate, a man is delayed by 1.5 hr. His normal time is—

a1hr
b$4\frac{1}{2}$ hr✓ Correct
c$3\frac{1}{2}$ hr
d$6\frac{1}{2}$ hr
general-mental-ability