Question

A cyclist covers a distance of 750 meter in 2 minutes 30 seconds. What is the speed in km/hr of cyclist ?

a. 16 km/hr
b. 17 km/hr
c. 18 km/hr
d. 19 km/hr​

Answer 1

.75km/150/3600hr=18km/hr

Answer 2

$\Large \underline{ \mathfrak{Answer : }} \\ \\ \sf Option \: C. \\ \\ \Large \underline{ \mathfrak{Solution : }} \\ \\ \boxed{ \rm Speed = \frac{Distance}{Time}} \\ \rm Distance = 750 \: meter \\ \rm Time = \text{2 min 30 sec} \\ \: \: \: \: \: \: \: \: \: \: \ \rm= 150 \: sec \\ \\ \rm Speed : \\ \qquad \sf= \frac{750}{150} \\ \qquad \sf= 5 \: m/sec \\ \\ \text{To Change m/s into km/h, } \\ \text{We have to multiply from} \rm \dfrac{18}{5}. \\ \\ \rm\implies 5 \times \frac{18}{5} \: km/hr \\ \implies \large \boxed{ \rm 18 \: km/hr}$