Question

a cyclist covers a distnce of 750m in 2min 30sec .what is the speed in km/hr of the cyclist

Answer 1

Speed =distance/time .d=750 time=2 1/2=5/2 seconds.750/5/2=750×2/5=150×2=300 convert km300×18/5=1080

Answer 2

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