Question

The age of rahul and haroon are in the ratio 7:5the no of boys is 8 more than the no of girls what is the total strength

Answer 1

Answer:

let total strength be boys + girls....

according to the sum,,,,

7x - 5x = 8,

2x = 8,

x =4..

so boys are 7x =7×4=28,

girls are 5x = 5×4=20,

total strength is 48.

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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

Thus current age of Rahul = 5*4 = 20Haroon = 7*4 = 28

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