Question

348. A person travels at the rate of 18 km per hour. His speed per second
in metres is:
(A) 5
(B) 18
(C) 9
(D) 10​

Answer 1

$\huge\fcolorbox{red}{lime}{ANSWER}$

$\mathbb\red{ANSWER \: IS \: 21 \: M/S}$