Question : The base of a right prism is a square having a side of 15 cm. If its height is 8 cm, then find the total surface area.
Option 1: 940 cm2
Option 2: 920 cm2
Option 3: 900 cm2
Option 4: 930 cm2
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Correct Answer: 930 cm 2
Solution :
Area of a base of the prism = (side)
2
= (15)
2
= 225 cm
2
Perimeter of a base of the prism = 4 × (side) = 4 × (15) = 60 cm
The total surface area of a prism
= (2 × Area of a base) + (Perimeter of a base × Height of a prism)
= (2 × 225) + (60 × 8)
= 450 + 480
= 930 cm
2
Hence, the correct answer is 930 cm
2
.
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