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?
A
₹ 3660
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B
₹ 3460
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C
₹ 3860
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D
₹ 3960
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Solution
The correct option is D ₹ 3960 Total petrol filled = 90 liters
Cost of 1 liter petrol = ₹ 44
Cost of 90 liters petrol = 44 x 90
= 44 x (100 – 10)
= 44 x 100 – 44 x10
= 4400 – 440
= ₹ 3960
Therefore, he spent ₹ 3960 on petrol.