a) 106455 litres

b) 136457 litres

c) 156450 litres

d) 225450 litres

correct answer is:

c) 156450 litres

Explanation

According to the question,
The capacity of a tank is 8000 litres.
Out of this, 6957 litres of water consumed.
\therefore Unconsumed water left in the tank is =\left(8000-6957\right) litres.
\rightarrow 1043 litres.
And there are 150 such tank in Malabar.
So that,
The total amount of water Unconsumed in Malabar is =\left(1043\times150\right) litres
\rightarrow 156450 litres.
Ans: The total amount of water Unconsumed in Malabar is 156450 litres.