Question

The age 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 parents ages?

Answer 1

Answer:

Rahul : 20 yrs Haroon: 28 yrs

Step-by-step explanation:

1) Let age be 5b and 7b for some positive integer b

2) ATP

5b+4+7b+4 is 56

12b + 8 is 56

12b is 56-8

12 b is 48

b is 48/12

.: b is 4

So rahul 5b is 5 × 4 which is 20

Similarly,

Haroon 7b is 7 × 4 which is 28

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Answer 2

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The age of Rahul and Haroon are in the ratio 5:7. Four years later the sum of ages will be 56 years. What are their present ages?

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Let the current age of Rahul and Haroon be 5x and 7x respectively

Four years later their ages become 5x + 4 and 7x + 4 respectively.

According to the question,

5x + 4 +7x + 4 = 56

or 12x + 8 = 56

Transposing 8 to the RHS we get,

12x = 48

Dividing both sides by 12 gives,

x = 48/12 = 4

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Thus current age of Rahul = 5*4 = 20

Haroon = 7*4 = 28

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