Question

The TSA of cylinder is 2860 sqcm Its height is 22cm find it radius.

Answer 1

Step-by-step explanation:

given:

TSA =2860cmsq

height= 22cm

radius=?

TSA=2πr(r+h)

2860/2π =r(r+22)

7x2860/22 = r^2+22r

455 =r^2+22r

r^2+22r-455=0

factors of above equation will be

r^2+35r-13r-455

r(r+35)-13(r+35)

(r+35)-(r-13)

r= 13,-35

r=13