The external and the internal radii of a hollow right circular cylinde – McqOptions

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1.	The external and the internal radii of a hollow right circular cylinder of height 15 cm are 6.75 cm and 5.25 cm respectively. If it is melted to form a solidÂ cylinder of height half of the orignal cylinder, then the radius of the solid cylinder is
A.	6 cm
B.	7.25 cm
C.	6.5 cm
D.	7 cm
Answer» B. 7.25 cm

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