Question 98

If the ratio of the speeds of three trains is 3:4:5 thenthe ratio of the times taken by them to cover the same distance is

Solution

Time and speed are inversely proportional

hence ratio of times =ย $$\frac{1}{3}:\frac{1}{4}:\frac{1}{5\ }$$

Multiply by 60, we get 20:15:12


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