Find ratio between total surface area of cylinder to curved surface area of cylinder. Give that its height and radius are 7.5cm and 3.5cm.
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Find ratio between total surface area of cylinder to curved surface area of cylinder. Give that its height and radius are 7.5cm and 3.5cm.
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Step-by-step explanation:
TSA = 2πr (h +r)
CSA = 2πrh
Answer:
ratio of TSA ANS CSA= 121:45.1
Step-by-step explanation:
TSA=2πr(h+r)
=2×22/7×3.5(7.5+3.5)
=2×22/7×3.5(11)
=22/7×77
=22×11
=242cm^2
(l)2=(r)2+(h)2
(l)2= (3.5)^2+(7.5)^2
(l)^2= 12.25+56.25
l= √68.5
l= 8.2 cm
CSA=πrl
=22/7×3.5×8.2
=11×8.2
CSA= 90.2
ratios are,
TSA:CSA
242:90.2
121:45.1