A school rewards students for good work by giving them merit points. James has x merit points. Sarah has four times as many merit points than james. Robert has 68 fewer merit points than james. Each merit point is worth 3 pence. All three of the students have a total of £15.60. Work out how many merit points each student has.

The required volume, if he wants to fill 75% of the pot's volume, is 11664cm³

Step-by-step explanation:

The volume of a pyramid is given as

Where V is the pot's volume, A is the base area and h is the height.

Our base is a square, so the base area, if s denotes the side length, would be s x s.

s = 36cm, therefore we have A = 36cm X 36cm = 1296cm².

The height is given as 36cm, therefore we have our volume to be:

Since Luis wants to fill 75% of the pot's volume with soil. Then it will take

Thus, the required volume, if he wants to fill 75% of the pot's volume, is 11664cm³