Question

1. Gauri spends 0.75 of her salary every month. If she earns
she save 39000 2
12000 per month, in how many months will​

Answer 1

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Answer 2

Correct Question:

Gauri spends 0.75 of her salary every month. if she earns Rs. 12000 per month, in how many months will she save Rs. 39000?

Answer:

$\underline{\bigstar\:\textbf{Saving in One Month :}}$

$:\implies\sf Saving=Income_{(Per\:Month)} \times Saving_{(Per\:Month)}\\\\\\:\implies\sf Saving=Income_{(Per\:Month)} \times (1-Expense)\\\\\\:\implies\sf Saving=Rs.\:12000 \times (1-0.75)\\\\\\:\implies\sf Saving=Rs.\:12000 \times 0.25\\\\\\:\implies\sf Saving=Rs.\:12000 \times \dfrac{25}{100}\\\\\\:\implies\sf Saving=Rs.\:120 \times 25\\\\\\:\implies\sf Saving_{(Per\:Month)}=Rs.\:3000$

$\rule{150}{1}$

$\underline{\bigstar\:\textbf{According to the Question :}}$

$:\implies\sf Total\:Saving=Saving_{(Per\:Month)} \times Months\\\\\\:\implies\sf Rs.\:39000=Rs.\:3000 \times Months\\\\\\:\implies\sf \dfrac{Rs.\:39000}{Rs.\:3000}=Months\\\\\\:\implies\underline{\boxed{\sf Months=13}}$

⠀

$\therefore\:\underline{\textsf{Gauri will take \textbf{13 months} to save that amount}}.$