A cistern 10 m long and 8 m wide contains water up to a depth of 1 m 50 cm. The total area of the wet surface is:	Select.
A) 120 m2  B) 136 m2  C) 128 m2  D) 130 m2  E) 134 m2
Area of the wet surface	= [2(lb + bh + lh) - lb]   = 2(bh + lh) + lb   = [2 (8 x 1.50 + 10 x 1.50) + 8 x 10] m2   = 134 m2.   answer :134 m2
<result>E</result>
A cistern 10 m long and 8 m wide contains water up to a depth of 1 m 50 cm. The total area of the wet surface is: