Question

Q 4. Find he surface area of the space figure represented by the net

Answer 1

The answer to your question would be second option and it is 124 cm^2.

Solution:
The surface area = area of rectangle 7*8 + area of rectangle 5*8 + two times the area of one triangle
area of rectangle 7*8 = 56 cm²area of rectangle 5*8 = 40 cm² area of one triangle = 0.5 * 7 * 4 = 14 cm²
Total area = 56 + 40 + 2*14 = 124 cm²

Answer 2

The surface area = area of rectangle 7*8 + area of rectangle 5*8 + two times the area of one triangle

area of rectangle 7*8 = 56 cm²
area of rectangle 5*8 = 40 cm²
area of one triangle = 0.5 * 7 * 4 = 14 cm²

Total area = 56 + 40 + 2*14 = 124 cm²

The correct choice is the second.