Question

The prism shown has a volume of 35cm³
Work out h, the height of the triangular cross section.

Answer 1

h = 2.5 cm

Explanation:

the volume (V) of a prism is calculated as

V = Al ( A is the area of triangular base and l the length )

A =
`(1)/(2)` bh =
`(1)/(2)` × 4 × h = 2h and l = 7

given V = 35 , then

2h × 7 = 35

14h = 35 ( divide both sides by 14 )

h = 2.5 cm