# 5. 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 rupees 44 per litre, how much did he spend in all on petrol?

Amount of petrol filled on Monday = $40\ litres$

Amount of petrol filled on Tuesday = $40\ litres$

$\therefore$ Total amount of petrol = $(40+40)\ litres = 80\ litres$

Cost of 1 litre of petrol = $Rs.\ 44$

$\therefore$ Cost of $80\ litres$ of petrol = $Rs.\ (44\times80)$

$= Rs.\ 3520$

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