The outer and inner diameter of a circular pipe are 6cm and 4cm respectively. If its length is 10cm , then what is the total surface?
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Step-by-step explanation:
Radius(R)=3cm
Radius (r)=2cm
height=10cm
outer radius+inner radius=3+2=5
T.S.A of cylinder =2h(R×R-r×r)
T.S.A of cylinder = 2×10(3×3-2×2)
= 20(9-4)
= 100
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