Question

the base circumstance of a cyinder is 80cm.if its height is 5cm ,then its lateral surface area is​

Answer 1

Answer:

GIVEN THAT CIRCUMFERENCE OF A CYLINDER IS 80

• WE KNOW THAT CIRCUMFERENCE = 2×pie × r
• 80 = 2×3.14×r( radius)
• = 80/2×3.14
• = 12.7(approx)
• Now we know the value of r
• lateral surface area = 2×pie× r × h
• = 2×3.14×12.7×5(r = 12.7)
• = 31.4×12.7
• = 398.78

Answer 2

Answer:

398.78cm2

Step-by-step explanation:

Circumference of circle =2πr

80=2*22/7*r

80=44/7*r

560/44=r

12.7cm(approx)=r

CSA of cylinder= 2πrh

=2*22/7*12.7*5

= 44/7*63.5

= 6.28*63.5

= 398.78cm2

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