Question

the average monthly consumption of petrol for car for 12 months is 160 litres.if the average monthly consumption for first 8 month is 145 litre then the average monthly consumption of petrol for the last 4 months is​

Answer 1

Answer:

The consumption of petrol in last 4 months is 190 litre.

Step-by-step explanation:

As given in question that consumption of petrol for a car for 12 months is 160 litre.

Consumption of petrol in first 8 months is 145 litre.

We have to find the consumption of petrol in last 4 months.

Let the consumption of petrol in last 4 months is x.

We know that,

160=(145*8+ x*4)/12

160 x 12 = 1160 + 4x

1920 - 1160 = 4x

760 = 4x

∴ x = 190 litre

Therefore, the consumption of petrol in last 4 months is 190 litre.

Answer 2

Since. the average consumption of petrol for a car for 7 months is 110 litres and for next 5 months it is 86 litres, ∴ the average monthly consumption is 7+5110×7+86×5 = 12770+430 = 100 L

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