Question

3) Find the volume and surface area of the
following cylinders, given the circumference
of the base and height.
(i) C = 110 cm, h = 20 cm
(ii) C=176 cm, h = 30 cm​

Answer 1

Answer:

Step-by-step explanation:

i)

Circumference= 110

Height= 20

We know that,

2πr= 110

r= 110÷2π

r= 110*7÷2*22

r= 35 cm

Volume= πr²h

=22÷7×35×35×20

= 77000 cm³

Surface area= 2πrh+2πr²

=12100 cm²

ii)

C= 176

h= 30

2πr=176

r=176×7÷2×22

r = 28 cm

Volume= πr²h

= 22/7×28×28×30

=73920 cm³

Surface area= 2πrh+2πr²

2×22÷7×28×30+2×π×28×28

10208 cm²

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