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WAEC - Mathematics (1994 - No. 33)
Two solid spheres have volumes 250cm
o
and 128cm
o
respectively. Find the ratio of their radii.
125:64
25:16
2:1
4:3
5:4
Explanation
4
/
3
πR
3
/
4
/
3
πr
3
=
250
/
180
= (
R
/
r
)
3
= 5:4
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