A cylinder of radius 4 cm and height 10 cm is melted and re casted into a sphere of radius 2 cm. How many such sphere are got ?
A25
B30
C15
D28
A25
B30
C15
D28
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A path of uniform width runs round the inside of a rectangular field 38 m long and 32 m wide. If the path occupies 600m2 , then the width of the path is