Question

A car travels 288 km in 4 hours and a train travels 540 km in 6 hours. The ratio of their speeds is

Options

• 5 : 4

• 4 : 5

• 5 : 6

• 3 : 5

Answer 1

4 : 5

`"Speed of the car" ="Distance"/"Time"="288 km"/"4hr"` = 72 km/hr

`"Speed of the train" ="Distance"/"Time"="540 km"/"6 hr"` = 90 km/hr

Ratio of their speeds = 72:90

where, `72/90=(72 ​÷ 18)/(90 ​÷ 18)=4/5` (H.C.F. of 72 and 90 is 18.)