CBSE Class 10 Answered
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Asked by | 06 Mar, 2009, 03:18: PM
Expert Answer
Mass = density X Volume
Density of a material is same let it be k
let V1 be the volume of smaller sphere and v2 be the volume of larger sphere
So ATQ
kV1 = 1 kg (i)
KV2 = 7 kg (ii)
dividing (i) by (ii) we get v1/v2 =1/7 Now radius of smaller sphere is 3 cm and let it be r for bigger sphere
33 / r3 = 1/7
r3 = 81 X 7
spheres are melted to form a bigger sphere,Let R be the radius
4/3 R3 = 4/3 ( 81 + 81 X 7 ) Solving we get R = 6 so diameter =12 cm
Answered by | 06 Mar, 2009, 04:18: PM
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