In a village, there are 8 water tanks to collect rain water. On a particular day, x litres of rain water is collected per tank. If 100 litres of water was already there in one of the tanks, what is the total amount of water in the tanks on that day?
Number of water tanks = 8
Water collected by 1 tank = x litres
Water collected by 8 tanks = 8 × Water collected by 1 tank
= 8 × x
= 8x litres
On a day 100 litres of water was already there in one of tank which means we should add 100 to total water collected by 8 tanks
∴ total amount of water = Water collected by 8 tanks + 100
Therefore, total amount of water in the tanks on that day is 8x + 100 litres