Question

A metal pipe is 77 cm long. The inner ft diameter of a cross section is 4 cm, Find its inner curved surface area.
2 points
968 cm2
1067 sq cm
955 sq cm
Other:
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Answer 1

Curved Surface Area of Inner Surface Area of Pipe = 2πrh

⇒ Curved Surface Area of Inner Surface Area of Pipe = 2 × π × r × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 2 × 22/7 × r × h

⇒ Curved Surface Area of Inner Surface Area of Pipe

= 2 × 22/7 × (diameter/2) × h

⇒ Curved Surface Area of Inner Surface Area of Pipe

= 2 × 22/7 × (4 cm/2) × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 2 × 22/7 × (2 cm) × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 44/7 × (2 cm) × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 44/7 × 2 cm × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 88/7 cm × h

⇒ Curved Surface Area of Inner Surface Area of Pipe = 88/7 cm × 77 cm

⇒ Curved Surface Area of Inner Surface Area of Pipe = 88/1 cm × 11 cm

⇒ Curved Surface Area of Inner Surface Area of Pipe = 88 cm × 11 cm

⇒ Curved Surface Area of Inner Surface Area of Pipe = 88 × 11 cm²

⇒ Curved Surface Area of Inner Surface Area of Pipe = 968 cm²

Answer 2

Step-by-step explanation:

968 cm^2

CSA =2πrh

CSA=2*22/7*2*77

CSA=2*22*11*2

CSA=44*22

CSA=968cm^2