Question

find the curved surface area and the total surface area of cylinder the diameter of whose base is 14 cm and height is 40 cm

Answer 1

curved surface area ,2πrh=2×22/7×7×40=1760. TS A= 2πrh+2πr²=1760+308=2068

Answer 2

hey !!!

Curved surface area of cylinder =2πrh

so...here r = 14/2 cm =7cm.


and ...height= 40cm

now..from formula 2×22/7×7×40

=>1760cm²

and ...Total surface area of cylinder = 2πrh +πr²+πr²

=> 2πr(h+r)

=> 2×22/7×7(40+7)

=> 44×47 =2068 CM² Answer ..

hope it helps you!!

@Rajukumar111