find the diameter of a sphere whose surface area is 616cm²
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Answered by
5
Diameter is 14cm.
4πr^2=616
4*22/7*r^2=616
r^2= 616*7/22*4
We will get r^2 = 49 cm
Therefore r=7 cm
therefore d=14cm
You can take π as 3.14 if specified... If not specified then you should take 22/7
Please mark the brainlest answer if you are helped.
Regards,
Mann02
Helping hand
4πr^2=616
4*22/7*r^2=616
r^2= 616*7/22*4
We will get r^2 = 49 cm
Therefore r=7 cm
therefore d=14cm
You can take π as 3.14 if specified... If not specified then you should take 22/7
Please mark the brainlest answer if you are helped.
Regards,
Mann02
Helping hand
Answered by
2
d=?
surface area= 616cm*2
surface area = 4pie r*2
616= 4×3.14×r*2
616=12.56×r*2
616/12.56=r*2
49.044=r*2
r= 7.003
let us take first 2 decimal places
so; r= 7.00 or 7
2r= diameter
2×7= diameter or 2×7.003=diameter
d=14or 14.003cm
surface area= 616cm*2
surface area = 4pie r*2
616= 4×3.14×r*2
616=12.56×r*2
616/12.56=r*2
49.044=r*2
r= 7.003
let us take first 2 decimal places
so; r= 7.00 or 7
2r= diameter
2×7= diameter or 2×7.003=diameter
d=14or 14.003cm
Mann02:
In the question its not specified so your anwer 7.003 is wrong
correct answer is 7cm
if not specified you should take π as 22/7
no 22/7 is equal to 3.14
I have also given 7 as the answer
if u take 22/7 also u will get in decimals only
The another person who has given the another answer , he also got in decimals only but he has taken in rounded form.
so anyway Happy Diwali
Happy Diwali
But still our teacher has told us that if the value is specified then only we can use 3.14
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