Question

a car convered a distance of 850 m in 40 seconds. calculate the distance it covers in one hour.

Answer 1

Given
Distance in 40 sec=850m
Ie distance in 1sec=850/40
=85/4m
1 sec=1/60×60 hr
Now in 85/4 sec=85/4×60×60
85×10ttp-2/144 hr ans

Answer 2

Distance and time is g8ven so that we can find speed Speed=distance /time and we get speed=21.25m/sec and now in question t is asking for distance coverd in an hour so T=1hr and put this in the formula S=D×18/5×T and then you will get your answer i.e D= 76.5km