A train covers of 225 km in $2\frac{1}{2}$ hours ar a uniform speed. The time taken by the train (in hours) to cover a distance of 630 km at the speed is :

5 7 6 4

7

Distance = Speed × Time According to question , Speed = \(\frac{225}{2.5}\) = 90 km/h Now , Time taken by train to cover 630 km with same speed = = \(\frac{630}{90}\)  = 7 hours