A cistern 10 m long and 6 m wide contains water up to a breadth of 1 m 35 cm. Find the total area of the wet surface.
Choices:  A) 100 m sqaure  B) 103 m sqaure  C) 152 m sqaure  D) 164 m sqaure  E) None of these
Explanation:   Area of the wet surface =   2[lb+bh+hl] - lb = 2 [bh+hl] + lb   = 2[(6*1.35+10*1.35)]+10*6 = 103 m square   Option 103 m sqaure
<result>B</result>
A cistern 10 m long and 6 m wide contains water up to a breadth of 1 m 35 cm. Find the total area of the wet surface.