After 60 litres of petrol was poured into an empty storage tank, it was still 10% empty.How much petrol (in litres, rounded off to two decimal place) must be poured into thestorage tank in order to fill it?

Correct option is D

Given:

60 litres of petrol were poured into an empty storage tank, but it was still 10% empty.

Solution:

Let the total capacity of the tank be C litres.

Since 60 litres is 90% of C, So

$$\frac{90}{100} \times C = 60$$​​

​$$C = \frac{60 \times 100}{90}$$​​

​$$C = \frac{6000}{90} = 66.67 \text{ litres}$$​​

Therefore, to fill the tank, 66.67 litres of petrol must be poured in.