Question

If I spend rs 243 on petrol in 3 weeks how much do I spend on petrol in a year?

Answer 1

Dear student,
Here is the solution of your asked query:
$$\begin{gathered} \mathrm{Amount}\mathrm{spent}\mathrm{on}\mathrm{petrol}\mathrm{in}3\mathrm{weeks}=\mathrm{Rs}.243 \\ \Rightarrow \mathrm{Amount}\mathrm{spent}\mathrm{on}\mathrm{petrol}\mathrm{in}21\mathrm{days}=\mathrm{Rs}.243\{\mathrm{Since}1\mathrm{week}=7\mathrm{days}\Rightarrow 3\mathrm{weeks}=3\times 7=21\mathrm{days}\} \\ \Rightarrow \mathrm{Amount}\mathrm{spent}\mathrm{on}\mathrm{petrol}\mathrm{in}1\mathrm{day}=\mathrm{Rs}.\frac{243}{21} \\ \Rightarrow \mathrm{Amount}\mathrm{spent}\mathrm{on}\mathrm{petrol}\mathrm{in}365\mathrm{days}=\mathrm{Rs}.\frac{243}{21}\times 365=\mathrm{Rs}.4223.57 \\ \mathrm{Since},1\mathrm{year}=365\mathrm{days} \\ \mathrm{Therefore},\mathrm{total}\mathrm{amount}\mathrm{spent}\mathrm{on}\mathrm{Petrol}\mathrm{in}1\mathrm{year}=\mathrm{Rs}.4223.57 \end{gathered}$$
Regards