Q. 325.0( 3 Votes )

# A bucket of

Upper end radius of frustum = d/2= 28/2 = 14 cm

Lower end radius of frustum = D/2 = 42/2 =21 cm

Height of the frustum = 24 cm

And we know,

The amount of milk that bucket can hold = Volume of the bucket

And, Volume of bucket = Volume of Frustum

Amount of milk that bucket can hold = Volume of frustum

Volume of frustum

Where R = Radius of larger or lower end and r = Radius of smaller or upper end and h = height of frustum π = 22/7

Volume of frustum

= 22 × 8 × 133

Volume of frustum = 23408 cm3

Also we know that 1 litre = 1000 cm3

Volume of frustum in litre = 23408/1000= 23.408 litre

Amount of milk that the bucket hold = 23.408 litre

The cost of milk = Rate of milk × amount of milk bucket holds

The cost of milk = 30 × 23.408

= Rs. 702.24

The cost of milk is Rs.702.24

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