Question

A taxi-driver, filled his car petrol tank with $40\mathrm{litres}$ of petrol on Monday. The next day, he filled the tank with $50\mathrm{litres}$ of petrol. If the petrol costs $\mathrm{Rs}44\mathrm{per}\mathrm{litres}$ how much did he spend in all on petrol $?$

Answer 1

Finding the spend in all the petrol filled:

Petrol filled by taxi driver in his car on Monday$=40litres$

Petrol filled by taxi driver in his car on Tuesday$=50litres$

Therefore, total petrol filled by taxi driver in his car$=40+50=90litres$

Since cost of $1$ litres of petrol $=Rs44$

Therefore cost of $90litres$ of petrol$=44x90=Rs3960$

Hence, driver spend $Rs3960$ in all petrol filled .