A cuboidal metal of dimensions 44 cm x 30 cm x 15 cm was melted and ca

1.	A cuboidal metal of dimensions 44 cm x 30 cm x 15 cm was melted and cast into a cylinder of height 28 cm. Its radius is ....(A) 20 cm(B) 15 cm(C) 10 cm(D) 25 cm
Answer» The correct option is: (B) 15 cm Explanation: Volume of cuboid = 44 x 30 x 15 cm³ This volume is equal to volume of cylinder .'. 44 x 30 x 15 = π x r² x 28 .'. r = 15 cm

A cuboidal metal of dimensions 44 cm x 30 cm x 15 cm was melted and cast into a cylinder of height 28 cm. Its radius is ....(A) 20 cm(B) 15 cm(C) 10 cm(D) 25 cm

Answer»

The correct option is: (B) 15 cm

Explanation:

Volume of cuboid = 44 x 30 x 15 cm³

This volume is equal to volume of cylinder

.'. 44 x 30 x 15 = π x r² x 28

.'. r = 15 cm