a cistern 9 m long and 6 m wide contains water up to a breadth of 2 m 25 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 * 2.25 + 9 * 2.25 ) ] + 9 * 6 = 122 m square option b"
add(multiply(const_2, add(multiply(add(divide(25, const_100), 2), 6), multiply(add(divide(25, const_100), 2), 9))), multiply(6, 9))