7. Engineer Avenido wants to know the amount of insulation needed in the building to reduce heat loss. What is the surface area of this building, if its length is 15m, height is 8 m and its width is 4m? *
1 point
A. 384 sq.mtr
B. 424 sq.mtr
C. 571 sq.mtr
D. 628 sq.mtr
1 point
A. 384 sq.mtr
B. 424 sq.mtr
C. 571 sq.mtr
D. 628 sq.mtr
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Answer:
B. 424 sq.mtr
LA=ph
(15×2) + (4×2) × 8
(30+8) × 8
38×8
304
B= l×h
15 × 4
60
L.A + 2B
304 (2×60)
304+120
= 424 sq.mtr