Question

alka spends 90% of the money that she receives every month and saves RD 120. how much money does she get monthly?

Answer 1

let X be alka's income..

(X ÷ 100) × 10 = 120
X = 1200 rs..

Answer 2

$\huge \bigstar$$\huge\bold{\mathtt{\purple{✍︎A{\pink{N{\green{S{\blue{W{\red{E{\orange{R✍︎}}}}}}}}}}}}}$$\huge \Rightarrow$

$\bold {Solution:}$

Suppose Alka recieves ₹$x$ per month.She spends 90% of the money she receives.

∴ She spends $\frac{90}{100} \times x = \frac{9x}{10}$

Savings = income - expenditure

∴ 120 = $x - \frac{9x}{10}$∴120 × 10 = $x × 10 - 9x$

...(multiplying both the sides by 10)

∴ 1200 = $10x - 9x$ ∴1200 = $x$

$\fbox \red{Ans: Alka receives ₹ 1200 per month.}$