The radii of two circular ends of frustum shape bucket are 14cm and 7 cm Height of the bucket is 30cm. How many litres of water it can hold? (1 litre =1000cm) ?
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Solution
Let, the radii of two circular ends of frustum shaped bucket is r1=14cm,r2=7cm and height of the bucket, h=30cm
We know that,
Volume of a frustum, V=πh3(r21+r1r2+r22)=π×303[142+(14×7)+72]=10π×343=10780cm3=107801000litres=10.78litres.