Question

Dumisani earns R42480 per month.He spilts his earnings in the ratio 7:5 and then saves lesser amount.Hiw much does he saves?

Answer 1

17700

Step-by-step explanation:

Let expenditure be 7x.

Let savings be 5x.

7x+5x=42480

12x=42480

x=42480/12

x=3540

Savings=3540×5

=17700

Answer 2

Answer:

He saves 17700 rupees.

Step-by-step explanation:

Given, Dumisani earns Rs 42480 per month.

So, amount of total money = 42480 rupees.

It is also given that he spilts his earnings in the ratio 7:5 .

This is a problem of ratio.

Now question is what is ratio ?

Ratio is a form of fraction.By ratio,we can compare two identities.

If a and b be two numbers then ratio of a and b will be a:b.

For example, ratio of 25 and 50

$= 25 \ratio50 \\ = \frac{25}{50} \\ = \frac{1}{2} \\ = 1 \ratio 2$

Let, greater part be 7x rupees and lesser part is 5x rupees.

According to question,

$7x + 5x = 42480 \\ 12x = 42480 \\ x = \frac{42480}{12} \\ x = 3540$

Therefore, greater part is (7× 3540) = 24780 rupees

and lesser part is (5×3540) = 17700 rupees

So, required amount of saving is 17700 rupees.

Know more about ratio,

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