Question

radius+height=21cm CSA=616 cm^2 then find TSA

Answer 1

Answer:

TSA = 924 cm^2

Step-by-step explanation:

h+r=21 ------ (1)

r=21-h

CSA = 616 cm^2

2πrh=616cm^2

22/7×(21-h)h=616/2

22/7×21h-h^2=308

21h-h^2=308×7/22

21h-h^2=14×7

21h-h^2=98

h^2-21h+98=0

by solving the we get,

h=14 ------- (2)

putting (2) in (1)

r=7

TSA=2πr(h+r)

=2×(3.14)×(7)(21)

TSA = 924 cm^2

Hope it helps...

Answer 2

Answer:

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