A cistern 8m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:
Select the correct option.
A) 62 m2	B) 50 m2	C) 53.5 m2	D) 55 m2	E) 57 m2
Area of the wet surface	= [2(lb + bh + lh) - lb]   = 2(bh + lh) + lb   = [2 (4 x 1.25 + 8 x 1.25) + 8 x 4] m2   = 62 m2.   62 m2nswer: Option 62 m2
<result>A</result>
A cistern 8m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is: