Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

The radius of the base of right circuler cylinder increase by 75percent &height is decreased by 50percent .find the percent increase & decrease in

curve surface .



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Initial curved surface area of cylinder = 2πr h
new radius, R = r + 75% of r = 1.75 r
new height, H = h - 50% of h = 0.5 h
new curved surface area =2πRH = 2π×(1.75 r)×(0.5 h)
                                        = 2πrh ×0.875 
area decreased = 2πrh - 2πrh ×0.875 =  0.125 ×2πrh
percent decrease = [(0.125
×2πrh)/(2πrh)]×100 = 12.5%
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts