The volume of the triangular prism is 120 cm3The base length of the is

1.	The volume of the triangular prism is 120 cm3The base length of the isosceles triangle is 8 centimetresThe height of the triangle is 3 centimetresThe side edge of the cross section of triangular prism is 5 centimetres.What is the surface area?
Answer» Answer: Volume of right isoceles prism = 1000 cm^3 Length = 20 cm. Area of ONE right triangular side = 1000/20 = 50 cm^2 1/2×a^2 = 50 => a^2 = 100 => a = 10 cm. Base or hypotenuse of right triagular SIDES => √(100 + 100) = 10√2 Lateral surface area => (10 + 10 + 10√2)×20 = 682.84 cm^2. Total surface area => 782.84 cm^2.

The volume of the triangular prism is 120 cm3The base length of the isosceles triangle is 8 centimetresThe height of the triangle is 3 centimetresThe side edge of the cross section of triangular prism is 5 centimetres.What is the surface area?

Answer»

Answer:

Volume of right isoceles prism = 1000 cm^3

Length = 20 cm.

Area of ONE right triangular side = 1000/20 = 50 cm^2

1/2×a^2 = 50 => a^2 = 100 => a = 10 cm.

Base or hypotenuse of right triagular SIDES =>

√(100 + 100) = 10√2

Lateral surface area =>

(10 + 10 + 10√2)×20 = 682.84 cm^2.

Total surface area => 782.84 cm^2.

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The volume of the triangular prism is 120 cm3The base length of the isosceles triangle is 8 centimetresThe height of the triangle is 3 centimetresThe side edge of the cross section of triangular prism is 5 centimetres.What is the surface area?

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