Question

The ratio between the speeds of two trains is 7: 8. If the second train runs 440 kms in 4 hours, then the speed of the first train is: 

A.    47.4 km/hr


B.    57.19 km/hr


C.    68.13 km/hr


D.    96.25 km/hr

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Answer 1

Answer :

Option => D.

=> 96.25 km/hr.

Step-by-step explanation:

Given :

The ratio between the speeds of two trains is 7: 8.

The second train runs 440 kms in 4 hours.

To Find :

The speed of the first train.

Solution :

We know that :

$\bigstar\;\boxed{\sf Speed = \dfrac{Distance}{Time}}}$

Put the given values :

★ Consider the -

Speed of the first train speed 1x and second 2x.

⇒ 2x = $\dfrac{440}{4}$

⇒ x = 13.75

⇒ 7 × 13.75

⇒ 96.25 km/hr.

∴ The speed of the first Train is 96.25 km/hr. and Option => D is correct.