Question

Find the height of a solid circular cylinder having total surface area of 660 cm^2 and radius 5 cm

Answer 1

TSA of cylinder=2Πr(h+r)
660=2×22/7×5(5+h)
660×7/22×5×2=(5+h)
660×7/22×10=(5+h)
3×7=5+h
21-5=h
16 cm=h

Answer 2

My camera isn't working so I'm writing
Yaa of cylinder =2pi r(r+h)
660=2x22/7x5(5+h)
5+h=660×1/2×7/22×1/5
5+h=21
h=21-5
h=16