Question

A cyclist covers a distance of 750 m in 2 mins 30 secs. what is the speed in km/hr of the cyclist:

Answer 1

Answer:Distance,d=750m
Time,t=2mins 30secs =120secs+30secs=150secs
Speed=d/t
=750/150
=5 m/s
Therefore,speed in Km/h
=5/1000km /1/3600h
=18km/h

Answer 2

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