Question

7. A car takes 7 hours to cover a certain distance at the speed of 48 km/h. if the speed is decreased by
20 km/h, how much time will it take to cover the same distance?

A man works 8 hours daily and completes a task in 12 days. If he works shoun daily, in how many days
will the same work be completed?​

Answer 1

Answer:

Let Distance covered =x km.

x=48×7km.

Now

Speed = 48−20=28km/h

Time=

Speed

Distance

=

28

48×7

=12hours

It will take 16 days to complete the same work

Answer 2

Answer:

See distance=speed×time

7×48=336km is the distance

now speed=28km/hour

now time=distance/time

=336/28

=12hour

so the car will take 12 hours to cover the same distance