Question

2 similar rectangular pyramids have a similarity ratio of 4:5. What is the ratio of their volumes? Put your answer in the form a:b

Answer 1

64:125

Explanation:

When you go from a length ratio to an area ratio you need to square the numbers involved:
`4^(2) :5^(2)` = 16 : 25

By the same logic, if you want to go from length to volume you need to cube the numbers involved:
`4^(3) :5^(3)` = 64 : 125