Question

ABCDE is the end view of a factory shed which is 50 m long. The roofing of the shed consists of asbestos sheets as shown in the figure. The two ends of the shed are completely closed by brick walls.
Find the total surface area (including roofing) of the shed.

Answer 1

Total area 
= 2 x Area of asbestos + 2 x Area of wall + 2 x AE x length
= 500 + 2 x 72 + 2 x 7.5 x 50  ...(from a and b)
= 500 + 144 + 750
= 1394m²
∴ The total surface area of the shed is 1394m².