Question

The cost of petrol was ₹400 per litre. If it increases by __%, then the revised cost would be ₹440 per litre.

• A. 10

Answer 1

The correct option is A 10
Increase in petrol price = ₹440 - ₹400 = ₹40

Let the increase be a%.

a% of Initial value = Increase
$\Rightarrow \frac{a}{100}\times 400=40$
$\Rightarrow a=\frac{40}{400}\times 100=10$

Therefore, there is 10% hike in the cost of petrol.