the volume of two spheres are in the ratio 64 :27 find difference of their surface area if the sum of their radii is 7
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Answered by
18
Here is your solution
Ratio of volumes=64:27
Therefore ratio of radii=4:3
sum of radii =>7=4+3
Therefore radii of 2 spheres = 4 and 3
difference in surface areas=?
Difference in surface areas is 88 unit
hope it helps you
Ratio of volumes=64:27
Therefore ratio of radii=4:3
sum of radii =>7=4+3
Therefore radii of 2 spheres = 4 and 3
difference in surface areas=?
Difference in surface areas is 88 unit
hope it helps you
Answered by
9
Volume of two spheres in the ratio = 64: 27
The sum of their radii is = 7cm
The difference of their surface areas = ?
Let and be the radii of the two squares and and with their corresponding volumes.
.......(1)
But, [Using(1)]
Now, surface area of the first sphere
and surface area of the second sphere
•°•
Hence, the difference of their surface areas = 88cm²
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