Question

In 8 minutes, Rajan jogs 800 meters. What is the speed in Km/h?

Answer 1

Hint: Convert distance given in meter into kilometer and time given in minutes into hours.
1 kilometer=1000 meters and 1 hour=60 minutes.

Complete step-by-step answer:
According to question,
Distance covered by Rajan = 800 meters and time taken by Rajan = 8 minutes
So, converting distance given in meters into kilometers
1 kilometer=1000 meters
1 meter= $\dfrac{1}{{1000}}$ kilometers
$\therefore $ 800 meters=$800 \times \dfrac{1}{{1000}}$ kilometers
800 meters= 0.8 kilometers
Converting time given in minutes into hour
1 hour=60 minutes
1minute=$\dfrac{1}{{60}}$ hours
$\therefore $ 8 minutes=$8 \times \dfrac{1}{{60}}$hours
8 minutes=0.1334 hours
Now, Speed(km/hrs.)$ = \dfrac{{\text{Distance(km)}}}{{\text{Time(hr)}}}$
Speed=$\dfrac{{0.8}}{{0.1334}}$km/hrs.
Hence, speed in km/hrs = 6km/hrs

Note: For solving such questions, use conversion as mentioned above in the question or firstly calculate in m/s and then multiply it by $\dfrac{{18}}{5}$ to convert in km/hr.