If the TSA of a cylinder is 1672 cm^2 and h = 12 cm, find r. 

Asked by dhanya_mk2000 | 10th Jan, 2020, 08:05: PM

Expert Answer:

straight T. straight S. straight A. equals space 2 πr left parenthesis straight h plus straight r right parenthesis space space
1672 equals 2 cross times 22 over 7 cross times straight r left parenthesis 12 plus straight r right parenthesis space space
1672 cross times fraction numerator 7 over denominator 2 cross times 22 end fraction equals straight r left parenthesis 12 plus straight r right parenthesis space space
266 equals straight r left parenthesis 12 plus straight r right parenthesis space space
straight r squared space plus 12 straight r minus 266 equals 0 space
using space formula space method
straight r equals 11.37 cm

Answered by Arun | 11th Jan, 2020, 10:14: PM