A taxidriver 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 litre, how much did he spend in all on petrol?
Petrol filled on Monday = 40 litres
Petrol filled on Tuesday = 50 litres
Total petrol filled = (40+50) litres
Cost of petrol = 44 Rs per litre
Total money spent on petrol = 44 × (40+50)
= 44 × 40 + 44 × 50
= 1760+2200
= 3960 Rs.