Question

The speeds of a cat, a dog, and a mouse are in the ratio 5:7:9. What is the ratio of time
taken by each one of them to cover the same distance?

Answer 1

Answer:

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.

∴ Ratio of time taken=

5x

y

:

4x

:

6x

y

Answer 2

Answer:

cat : dog : mouse = 5 : 7 : 9 = k (say)

speed = distance / time

time = distance / speed

Distance traveled is same.

time of cat : time of dog : time of mouse = 1/speed of cat : 1/speed of dog : 1/speed of mouse

= 1/5 :1/7 :1/9

= 315/5 : 315/7 : :315/9 (LCM of 5, 7 and 9 is 315)

= 63 : 45 : 35 ANSWER