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If the lateral surface of a cylinder is 94.2 and its height is 5 cm, then find the
(i) radius of its base
(ii) its volume. (Use  = 3.14)

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(i) Height (h) of cylinder = 5 cm Let radius of cylinder be r. CSA of cylinder = 94.2 cm2 2πrh = 94.2 cm2 (2 × 3.14 × r × 5) cm = 94.2 cm2 r = 3 cm (ii) Volume of cylinder = πr2h = (3.14 × (3)2 × 5) cm3 = 141.3 cm3
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(i) Height (h) of cylinder = 5 cm

Let radius of cylinder be r.

CSA of cylinder = 94.2 cm2

rh = 94.2 cm2

(2 × 3.14 × r × 5) cm = 94.2 cm2

r = 3 cm

(ii) Volume of cylinder = πr2h

= (3.14 × (3)2 × 5) cm3

= 141.3 cm3

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I have 3year exp.in teaching area.many of my student got good marks and crack the entrance exam.

Surface area =94.5 cm sq. Given 94.5=πr^2h 94.5=3.14*r^2*5 r^2=94.5/3.14*5 r^2=6.19 r=√6.19cm
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Related Questions

The circumference of the base of a cylindrical vessel is 132 cm and its height is 25 cm. How many litres of water can it hold? (1000  = 1l)

Let the radius of the cylindrical vessel be r. Height (h) of vessel = 25 cm Circumference of vessel = 132 cm 2πr = 132 cm Volume of cylindrical vessel = πr2h = 34650 cm3 = 34.65 litres Therefore, such vessel can hold 34.65 litres of water.
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