Answers

2015-08-01T20:42:28+05:30
A cube's area is 6a^2
A sphere's area is \frac{4}\pi r^2

The cube is inscribed directly into the sphere so the radius of the sphere should be the side of the cube.

60/6=10
√10=side of cube

√10²=10
4π10≈125.663

Asn=approx 125.663
0
Surface area of cube = 6a2 (a is length of a side)
From Q; 6a2 = 60
 a2 = 10
The diameter of the sphere is the diagonal of the cube.
 (diameter)2 = a2 + ( a)2
= 3a2
so diameter = a
so surface area of sphere = 4 (radius)2
= 4 ( a)2
= 3 a2
= 30  cm2
this was the ans. i got
is it ok?/?