Question

A bus takes 4.5 hours to cover the distance of 180 km between Delhi and Roorkee. How much time will it take to cover a distance of 280 km ?

Answer 1

Time - 4.5 hrs
Distance- 180 km
Speed = distance÷ time
= 180÷45/10 km/hr
= 40 kmph
Now
Time to cover 280 km
Time = 280÷40 h
= 7 h

Answer 2

Answer:

7 hours

Step-by-step explanation:

Given:- Bus takes 4.5 hours to cover a distance of 180 km.

To Find:- Time taken by bus to cover a distance of 280 km.

Solution:-

As we know, Speed = Distance/Time

∴ Speed of bus = Distance Covered / Time taken

                          = 180 / 4.5 km/hr

                          = 180 / (45/10) km/hr

                          = 180 / (9/2) km/hr

                          = 20 × 2 km/hr

                          = 40 km/hr.

As we know, Time = Distance/Speed

As Speed of the bus = 40 km/hr and Distance = 280 km

∴ Time taken = 280 / 40 hr

                      = 7 hours

Therefore, time taken by bus to cover a distance of 280 km's = 7 hours.

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