Height of the bucket = 40 cm
Radius of the upper part of bucket = 35 cm
R1 = 35 cm and
R2 = 14 cm
The volume of the bucket
Hence, the correct answer is choice (b).
The radii of the circular ends of a bucket of height 15 cm are 14 cm and r cm (r < 14). If the volume of bucket is 5390 cm3, find the value of r.