Q1 of 52 Page 148

The radii of two circular ends of frustum shape bucket are 14 cm and 7 cm. Height of the bucket is 30 cm. How many liters of water it can hold? (1 litre = 1000cm3)

The two radii of frustum are, r1 = 14cm and r2 = 7cm

Height of bucket, H = 30 cm


As we know that,




⇒ V = 10780 cm3


Now, as 1litre = 1000cm3


⇒ V = 10.780 litre


∴ Bucket can hold 10.780 litres of water


More from this chapter

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11

Find the surface area and the volume of a beach ball shown in the figure.

 12

As shown in the figure, a cylindrical glass contains water. A metal sphere of diameter 2 cm is immersed in it. Find the volume of the water.

 2

The radii of ends of a frustum are 14 cm and 6 cm respectively and its height is 6 cm. Find its

i) Curved surface area


ii) Total surface area


iii) Volume

 3

The circumferences of circular faces of a frustum are 132 cm and 88 cm and its height is 24 cm. To find the curved surface area of the frustum complete the following activity.


Circumference1 = 2πr1 = 132



Circumference2 = 2πr2 = 88



Slant height of frustum,



Curved Surface area of frustum = π(r1 + r2)l