Question

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

• A. Rs. $7.98$
• B. Rs. $8$
• C. Rs. $8.50$
• D. Rs. $9$

Answer 1

Answer: (B)

Rs. $8$

Avg cost = $\frac{7.5+8+8.5}{3}$

$=\frac{24}{3}$

$=8$

Hence, average cost per liter is '8' rupees