A car takes 50 minutes to cover a certain distance at a speed of 54 km/h. If the speed is increased by 25%, then how long will it take to cover three-fourth of the same distance?

30 minutes

Speed is increased by 25% .

So , Ratio of      Initial          New

Speed                  4       :       5

Time                    5       :       4

According to question ,

5R = 50 minutes

1R = 10 minutes

4R = 40 minutes

Time taken to cover \(\frac{3}{4}\)th of distance with new speed = \(\frac{3}{4}\) × 40 = 30 minutes