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

Petrol filled on Monday and Tuesday = 40 litres + 50 litres = 90 litres                                                                                                                      Cost of petrol = Rs. 44 per litre $=90\times \text{Rs}\text{.}\,44$ = Rs. 3960.