A taxi driver 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
54 per litre, how much did he spend in all on petrol?
tell me fast!
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Petrol filled on Monday = 40 liter
Petrol filled on next day = 50 liter
Total petrol filled = 90 liter [40+50=90]
Now ,
Cost of 1 Liter petrol = Rs. 44
Therefore , Cost of 90 liter petrol = 44 × 90
= 44×(100-10)
=44×100-44×10
=4400 - 440
= 3960
Hence , he spents Rs.3960 on petrol.
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