With a rectangular prism with a length of 20 cm, height of 30 cm, and volume of 3600 cm, first set up the formula for the volume of a rectangular prism.
1/6 < 1/4 so 1/6 would equal 2/12 and 1/4 would equal 3/12 so which means if you take one from each it would be 5/12 but if you took 2 from the first one it would only be 2/12 which is why you need to read correctly because THE REASON MARK IS CORRECT IS BECAUSE 5/12 IS GREATER THAN 2/12