infosys - rajesh bought an acid bottle it is evaporative in nature he bought acid containing 24 litres of concentrated acid he paid at the rate of rs2452 per litre since he could not get them at a cheaper priceon the first day 18 of the acid got evaporated on - skillgun

In this problem rate at which the acid was bought is given only to distract the attention of the reader.
On the first day 1/8 got evaporated means for the second day balance left is 7/8.
On the second day 2/3 of the balance got evaporated means 7/8 x 2/3 = 7/12 got evaporated
Balance acid left out = 7/8 - 7/12 = 7/24
On the third day 1/7 got evaporated means what is left in the container is 6/7 of the balance at the end of second day.
Quantity of acid left in the container = 7/24 x 6/7 = 1/4
1/4 x 24 = 6 litres