Question

A car covers 72 km in 2 hours and a train covers 120 km in 3 hours. Find the ratio of their speeds
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Answer 1

Answer:

speed of car=72/2=36km/hr

speed of train=120/3=40km/hr

therefore,ratio of car and train speed us 36:40=9:10

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Answer 2

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GIVEN

• A car covers 72 km in 2 hours .

• A train covers 120 km in 3 hours.

FORMULA

•

$Speed = \frac{distance}{taken \: time}$

SOLUTION

• Let v1 is the speed of car and v2 is the speed of train

• By using formula of speed

$\rarr \: \: v1 = \cancel\frac{72}{2} = 36 \: km \: {s}^{ - 1}$

it becomes 36 dividing 72 by 2

$\rarr \: \: v2 = \cancel\frac{120}{3} = 40km \: {s}^{ - 1}$

it becomes 40 dividing 120 by 3

Now the ratio of v1 and v2 =

$\frac{v1}{v2} = \cancel\frac{36}{40} = \frac{9}{10}$

v1 : v2 = 9 : 10