Question

The ages of rahul and Haroon are in the ratio 5:7 four years later the sum of their ages will be 56 years , What are their present ages​

Answer 1

Answer:

Step-by-step explanation:

let the present ages of rahul and haroon be x and y

x:y=5:7⇒7x=5y⇒x=5y/7(equation 1)

after four years

(x+4)+(y+4)=56⇒x+y+8=56⇒x+y=48(equation 2)

substituting equation 1 in equation 2

5y/7 +y=48⇒5y+7y/7=48⇒ 12y/7=48⇒ y=48×7/12⇒ y=28

there fore,x=5y/7=5×28/7⇒x=20

so the ages of rahul and haroon are 20 and 28 years respectively.

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Answer 2

Answer:

Given,

Ratio of ages of Rahul and Arun is 5 : 7

Here, X be the common part

Therefore,

Rahul's age = 5 × X = 5X years

Arun's age = 7 × X = 7X years

A.T.Q,

(5X + 4) + (7X + 4) = 56

or, 5X + 4 + 7X + 4 = 56

or, 12X + 8 = 56

or, 12X = 56 - 8

or, 12X = 48

or, X = 48/12

or, X = 4

Therefore,

Rahul's present age = 5X years

= 5 × 4 years

= 20 years

Arun's present age = 7X years

= 7 × 4 years

= 28 years