Find the surface area (in sq. cm.) of a cylindrical container with radius 4 cm and height 10 cm, assuming it has an open top and a closed bottom.

301.7 s q . c m .

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351.9 s q . c m .

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251.3 s q . c m .

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421.6 s q . c m .

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Solution

The correct option is A $301.7 s q . c m .$
Given that,
Radius of the cylindrical container
= 4 cm.
Height of the cylindrical container
= 10 cm.

Surface area of cylindrical container = Lateral surface area + area of base
$= 2 π r h + π r^{2}$
$= 2 \times \frac{22}{7} \times 4 \times 10 + \frac{22}{7} \times 4 \times 4$
$= 301.7 s q . c m .$

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Find the surface area (in sq. cm.) of a cylindrical container with radius 4 cm and height 10 cm, assuming it has an open top and a closed bottom.

The correct option is A 301.7 sq.cm.Given that, Radius of the cylindrical container = 4 cm. Height of the cylindrical container = 10 cm. Surface area of cylindrical container = Lateral surface area + area of base =2πrh+πr2 =2×227×4×10+227×4×4 =301.7 sq.cm.