A car owner buys petrol at Rs.,7.50, Rs., 8 a | vedclass

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Question

In the first year petrol consumed $=\frac{4000}{7.5}$ litres

In the second year petrol consumed $=\frac{4000}{8}$ litres

In the third year petro

Vedclass · Accepted Answer

$8$

Vedclass · Answer

In the first year petrol consumed $=\frac{4000}{7.5}$ litres

In the second year petrol consumed $=\frac{4000}{8}$ litres

In the third year petrol consumed $=\frac{4000}{8.5}$ litres

Average price/litre of petrol $=\frac{4000 	imes 3}{\frac{4000}{7.5}+\frac{4000}{8}+\frac{4000}{8.5}}$

$=\frac{3 	imes 7.5 	imes 8 	imes 8.5}{8 	imes 8.5+7.5 	imes 8.5+7.5 	imes 8}$

$=\frac{1530}{68+63.75+60}=\frac{1530}{191.75}$

$=$ $Rs. \,8 /litre$

A car owner buys petrol at $Rs.\,7.50, Rs.\, 8$ and $Rs.\, 8.50$ per $litre$ for three successive years. What approximately is the average cost per litre of petrol if he spends $Rs.\, 4000$ each year ?(in $Rs.$ )

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