Question

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* 44 per litre, how much did he spend in all on petrol?​

Answer 1

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Petrol filled on Monday = 40 liters

Petrol filled on next day = 50 liters

Total petrol filled = 90 liters

Now, Cost of 1 liter petrol = Rs. 44

Cost of 90 liters petrol = 44 x 90

= 44 x (100 – 10)

= 44 x 100 – 44 x10

= 4400 – 440

= Rs. 3960

Therefore, he spent Rs. 3960 on petrol.

Answer 2

Answer:

Given, quantity of petrol filled on Monday = 40 L Quantity of petrol filled on the next day i.e. Tuesday = 50 L Total quantity of petrol = 40 + 50 = 90 L Cost of petrol = Rs. 44 per litre Total cost of petrol = Cost per litre x Total quantity of petrol = 44 x 90 = Rs. 3960 Hence, total cost of petrol is Rs.