a cistern 8 m long and 6 m wide contains water up to a breadth of 1 m 85 cm . find the total area of the wet surface .
"explanation : area of the wet surface = 2 [ lb + bh + hl ] - lb = 2 [ bh + hl ] + lb = 2 [ ( 6 * 1.85 + 8 * 1.85 ) ] + 8 * 6 = 100 m square option b"
add(multiply(const_2, add(multiply(add(divide(85, const_100), 1), 6), multiply(add(divide(85, const_100), 1), 8))), multiply(6, 8))