find the total surface area of a hollow cylinder with height 10cm and radii 3cm and 4cm
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2pi Rh +2pi rh+pi(R^2-r^2)
2*22/7{4*10+3*10+16-9}
2*22/7*77= 484 cm square
2*22/7{4*10+3*10+16-9}
2*22/7*77= 484 cm square
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