Ram has a ball of diameter 7 cm. if 1 bottle of paint can paint 11 cm2, then how many bottles are needed to completely paint the ball?
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Solution :-
Diameter = 7 cm
Radius = 7/2 = 3.5 cm
Surface area of the sphere = 4πr²
⇒ (4*22*3.5*3.5)/7
= 154 cm²
Bottle of paint needed-
To cover the area of 11 cm² with paint, paint bottle required = 1
To cover the area of 1 cm² with paint, paint bottle required = 1/11
To cover the area of 154 cm² with paint, paint bottle will be required = (1*154)/11
= 14 bottles
So, 14 bottles of paint will be required.
Diameter = 7 cm
Radius = 7/2 = 3.5 cm
Surface area of the sphere = 4πr²
⇒ (4*22*3.5*3.5)/7
= 154 cm²
Bottle of paint needed-
To cover the area of 11 cm² with paint, paint bottle required = 1
To cover the area of 1 cm² with paint, paint bottle required = 1/11
To cover the area of 154 cm² with paint, paint bottle will be required = (1*154)/11
= 14 bottles
So, 14 bottles of paint will be required.
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