The side of a cubical box is 7 cm. How much are of the ground is covered by the box.
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Answered by
44
Answer:
The greatest diameter=side of the cube=7cm.
The radius of the hemisphere =3.5cm.
Now,
The Surface Area of Solid=Surface Area of Cube - Surface Area of Base Hemisphere + Curve Surface Area of Hemisphere
Surface Area of Cube
=6×side
2
=6×7×7
=294sq cm
Surface Area of Base of Hemisphere is,
=πr
2
=
7
22
×3.5
2
=38.5cm
2
Curved Surface Area of Hemisphere is,
=2×38.5
=77sq cm
∴ total Surface Area is =294−38.5+77
=332.5sq cm.
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8
Answer:
3m both side of box have 3.50m
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