A car travels a distance of 60 km at uniform speed. If the speed of car is increased by 8 km/hr, then it takes 2 hour less to cover the same distance. What is the original speed of the car?
Answer & explanation
Correct answer: option 1
Let speed = S km/hr
Distance = 60 km
Time taken = \(\frac{60}{S}\) hours
Now , Increased speed = (S + 8) km/hr
Distance = 60 km
Time taken = \(\frac{60}{(S+8)}\) hours
\(\frac{60}{S}\) - \(\frac{60}{(S+8)}\) = 2
on solving ,
S = 12 km/hr
So speed of car is 12 km/hr