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5. Ataxidriver filled his car petrol tank with 40 litres of petrol on Monday. Then
he filled the tank with 50 litres of petrol. If the petrol costs 44 per litre, how me
he spend in all on petrol?
Note th
dots in th
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Petrol filled on Monday = 40 liters
Petrol filled on next day = 50liters
Total petrol filled = 90liters
Now, Cost of 1 liter petrol = Rs. 44
Cost of 90 liters petrol = 44 x90
= 44 x (100 – 10)
= 44 x 100 – 44 x10
= 4400 – 440
= Rs. 3960
Therefore, he spent Rs. 3960 on petrol.
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