Question

Rohit spend rs. 280 and saves 30% of his pocket money. how much is his pocket money

Answer 1

ANSWER

Let the father's salary be Rs. x.

Then part of salary given to the two sons as pocket money =

100

x

Share of the elder son =

100

80

×

100

x

=

500

4x

Expenditure of the elder son =

100

80

×

500

4x

=

2500

16x

∴ Savings of the elder son =

500

4x

−

2500

16x

=

2500

4x

Given,

2500

4x

= Rs. 20

⇒x= Rs.

4

20×2500

⇒x = Rs. 12500

Answer 2

$\huge\underbrace{\green{\tt{\diamond\; Solution:}}}$

Let

Total Pocket Money be 'x'

Now, Savings = 30% of x

$→\;\Large{\frac{30}{100}×x}$

☞ $→\;\Large{\frac{30x}{100}}$

Given,

Amount Spend = Rs. 280.

$→\;\Large{\sf{x - \frac{30x}{100} = 280}}$

LCM is '100'

$→\;\Large{\sf{\frac{100x-30x}{100} = 280}}$

$→\;{\sf{70x = 280×100}}$

$→\;\Large{\sf{x = \cancel{\frac{28000}{70}}}}$

$→\;\boxed{\sf{x = 400}}$

.:. Total Pocket Money is $\fbox\red{Rs.400}$

Hope It Helps You ✌️