Question

Yong is measuring two pyramids whose bases are rectangles.

Given the length and width of the base of the first pyramid, as well as its volume V, Yong uses the formula
h=3v/lxW
to compute its height h to be 7 centimeters.

The second pyramid has the same volume and base length, but its base's width is 2 times as long. What is its
height?

Answer 1

Choice B

7/2 cm

Explanation:

Answer 2

Answer is 7/2 cm

Explanation:

1. Set a ratio

`7=(3V)/(l*w):h=(3V)/(l*2w)`

2. Move 2w from denominator to LHS (Left hand side)
`(7)/(2)w=(3V)/(l)`

`(7)/(2w)=(3V)/(l)`

3. The four options are 7/4, 7/2, 14 or 28 cm