A cistern 6 m long and 4 m wide contains water up to a breadth of 1 m 25 cm. Find the total area of the wet surface. Choose the correct choice from the following choices:
A) 42 m sqaure
B) 49 m sqaure
C) 52 m sqaure
D) 64 m sqaure
E) None of these
Explanation:   Area of the wet surface =   2[lb+bh+hl] - lb = 2 [bh+hl] + lb   = 2[(4*1.25+6*1.25)]+6*4 = 49 m square   Option 49 m sqaure
<result>B</result>
A cistern 6 m long and 4 m wide contains water up to a breadth of 1 m 25 cm. Find the total area of the wet surface.