A car can cover a distance of 420 km in 7 h. By how much has the speed to increase to cover the distance in 6 h?
Answer & explanation
Correct answer: option 2
According to Question ,
Speed = \(\frac{Distance}{Time}\)
Speed = \(\frac{420}{7}\) = 60 km/h
Now ,
If we complete the distance in 6 hours then speed should be
Speed = \(\frac{420}{6}\)
= 70 km/h
Difference in speed = 70 - 60 = 10 km/h
So , Speed should be increased by 10 km/h