A car covers a certain distance in 85 minutes if it runs at a speed of 36 km/hr. The speed at which the car must run to reduce the time of journey to 51 minutes will be:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 60 km/hr.
We know that,
Distance = Speed × Time
A car covers a certain distance in 85 minutes if it runs at a speed of 36 km/hr
Distance = 36 × 85/60 = 51 km
Now,
The speed at which the car must run to reduce the time of journey to 51 minutes will be
Speed = 51/(51/60)
⇒ 51 × 60/51 = 60 km/hr
So, The speed at which the car must run to reduce the time of journey to 51 minutes will be 60 km/hr