how many spheres of 15 cm diameter can be covered by 10mxm of material
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Answered by
4
Area of material=10 m²=10⁵cm²
radius of sphere=7.5 cm
surface area of sphere=4πr²
=4×π×(7.5)²
no.of sphere that can be covered=10⁵/4×π×(7.5)²
radius of sphere=7.5 cm
surface area of sphere=4πr²
=4×π×(7.5)²
no.of sphere that can be covered=10⁵/4×π×(7.5)²
Answered by
9
Radius of sphere = 15/2 cm = (15/2) * 10^-2 m
Surface area of sphere = 4 π r^2
= 4 * (22/7) * (15/2 * 10^-2)^2
= 0.070 m^2
Area of material = 10 m^2
Number of spheres which can be covered = 10 / 0.070 = 142.85
Total 142 spheres can be covered.
Surface area of sphere = 4 π r^2
= 4 * (22/7) * (15/2 * 10^-2)^2
= 0.070 m^2
Area of material = 10 m^2
Number of spheres which can be covered = 10 / 0.070 = 142.85
Total 142 spheres can be covered.
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