Question

The speeds of three cars are in the ratio 5 : 4 : 6 The ratio between the time taken by them to travel the same distance is

• A. 5 : 4 : 6
• B. 6 : 4 : 5
• C. 10 : 12 : 15
• D. 12 : 15 : 10

Answer 1

The correct option is D 12 : 15 : 10

Let the speed of the car be 5x,4x and 6x kmph
Distance travel by each car be y km.
$\therefore$ Ratio of time taken$=\frac{y}{5x}:\frac{y}{4x}:\frac{y}{6x}$
$=\frac{1}{5}:\frac{1}{4}:\frac{1}{6}$
$=12:15:10$