Question

The speed of the two trains are in the ratio 4:5 .if the speed of the first train is 64 km/h , what is the speed of the other train

Answer 1

Answer:

Answer:

The speed of two trains = 4:5

The speed of 1st train = 64km/h

So, the speed of 2nd train = n

The speed = 4÷5×64÷n (cross multiplication formula)

4n=5×64

n =5×64÷4

n =320÷4

n =80

Step-by-step explanation:

Answer 2

The speed of the other train = 80 km/h

Given :

• The speed of the two trains are in the ratio 4 : 5

• The speed of the first train is 64 km/h

To find :

The speed of the other train

Solution :

Step 1 of 2 :

Form the equation

Here it is given that speed of the two trains are in the ratio 4 : 5

The speed of the first train is 64 km/h

Let speed of the other train = S km/h

By the given condition

64 : S = 4 : 5

Step 2 of 2 :

Find speed of the other train

$\displaystyle \sf{ 64 : S = 4 : 5 }$

$\displaystyle \sf{ \implies \frac{64}{S} = \frac{4}{5} }$

$\displaystyle \sf{ \implies S = 64 \times \frac{5}{4} }$

$\displaystyle \sf{ \implies S = 16 \times 5 }$

$\displaystyle \sf{ \implies S = 80 }$

Hence the speed of the other train = 80 km/h