MathematicsA 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` 44 per liter, how much did he spend in all on petrol?

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` 44 per liter, how much did he spend in all on petrol?

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    Solution:

    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 spent Rs.3960 on petrol.

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