Question

A car can cover 600km in 8 hours if the speed is increased by 25kmph how much does the car can take to cover 800 km

Answer 1

RELATION BETWEEN SPEED,TIME AND DISTANCE :-

$speed = \frac{distance}{time}$

Average speed of a moving body can be calculated by dividing the distance covered by the time taken .

GIVEN :-

Distance covered = 600 km

Time Taken = 8 hrs

speed = ?

Now, speed = distance/time

$\frac{600}{8} = \frac{150}{2} = 75km {h}^{ - 1}$

New and increased speed is :-

( 75 + 25 )kmph [given speed increased by 25kmph]

=> 100 kmph

New distance = 800 km [given]

New speed = 100kmph [calculated]

New Time =?

$speed = \frac{distance}{time} \\ \\ \implies time = \frac{distance}{speed} = \frac{800}{100} \\ \\ \implies time = 8hr$

Hence, the new time taken by the car for covering 800km is 8hr.