Question

the height and volume of a cylinder are 21cm and 7528 cubic cm find its radius, CSA,TSA ​

Answer 1

Answer:

r=18.5cm

CSA=1628cm²

TSA=2703.64cm²

Step-by-step explanation:

given;

h=21cm

v=7528cm³

to find;

radius,CSA,TSA

answer;

v=7528

therefore,

1/3πr²h=7528

1/3×22/7×r²×21=7528

22×r²=7528

r²=342.2

r=18.5cm//////

CSA=πrl

= 22/7×18.5×l

l=√(r²+h²)

=√(342.2+441)

=√783.2

l =28cm

CSA=22/7×18.5×28

=22×18.5×4

CSA=1628cm²///////

TSA=πr(l+r)

=22/7×18.5(28+18.5)

=22/7×18.5×46.5

=2703.64cm²/////////