**(5) A taxi driver filled his car petrol tank with 40 liters of petrol on Monday. The next day,** **he filled the tank with 50 liters of petrol. If the petrol costs Rs. 44 per liter, how much did** **he spends in all on petrol?**

**Sol. **

According to the question,

Cost of 1 liter of petrol = Rs. 44

Petrol filled on Monday = 40 liters

Cost of 40 liters of petrol = 40 x 44

Petrol filled on Tuesday = 50 liters

Cost of 40 liters of petrol = 50 x 44

Total money spent on petrol on both days (Monday + Tuesday) = 44 x 40 + 44 x 50

= 44 x (40 + 50) …………..taking 44 as common

= 44 x 90

= 44 x 9 x 10

= 396 x 10

= 3960**Therefore, total Rs. 3960 is spent on petrol on both the days.**