Question

the circumference of the base of a right circular cylinder is 220cm. if the height of the cylinder is 2m, find the lateral surface area of the cylinder [pie=22/7]​

Answer 1

2×22/7×r=220

2×7×r=220/22

14r=10

r=10/14

r=0.7cm

LSA=2×22/7×r×h

=2×22/7×0.7×200cm (1m=100 cm)

400×22×0.1

400×2.2

880 sq. cm