Question

At a certain speed a car takes 4 hrs to complete the journey of 252 km. Time taken by the car to cover the journey if the speed of the car is decreased by 9 km/hrs.

Answer 1

Answer:

Step-by-step explanation:

At speed of 252 km per hour _9kmph =3.75 hours as method

Answer 2

Given - Time = 4 hours

Distance = 252 km

Find - Time taken when speed is reduced by 9 km/hr

Solution - Speed, distance and time are related by the formula -

Speed = Distance/time.

Finding the speed of car.

Speed = 252/4

Speed = 63 km/hr.

Now, speed is reduced by 9 km/hr.

So, new speed = 63 - 9

New speed = 54 km/hr

Time taken with reduced speed = distance/speed

Time taken = 252/54

Time taken = 4.6 hours

Thus, after reduced speed the time taken is 4.6 hours.