Question

a fish tank is 50 cm long, 30 cm wide, and 40 cm high. It contains water up to a height of 28 cm. How many more cubic centimeters of water are needed to fill the tank to a height of 35 cm?

Answer 1

Surface area = 50 x 30 = 150
Per cm of height 150 cubic cm needed
7cm height needed
150 x 7 = 1050 cubic cm needed