Question

Cuverd surface area of a cylinder is 1980 cm and radius of its base is 15 cm find the height of the cylinder and Pyare value 22 by 7

Answer 1

CSA= 1980cm
radius=15cm
CSA of cylinder = 2πrh
2×22/7*×15×h=1980
h=1980×1/2/×7/22×1/15
therefore,
h=21cm