Question

Plz help me on this question

Answer 1

78

Explanation:

Given the formula for the surface area of the prism, that is

SA = 2s² + 4sh

Substitute s = 3 and h = 5 into the formula and evaluate

SA = 2(3)² + 4(3)(5)

= 2 × 9 + 4 × 15

= 18 + 60

= 78