Find the radius of the cylinder if the total surface area of the cylinder is 968 cm sq. and the height is 15 cm
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the radius of the cylinder's surface is 1630.81 cm sq
Ashi01:
how did u get it? I'm getting it as a quadratic equation
Answered by
1
TSA of cylinder =2πr(r+h)
968=2×22/7×r(r+15)
968×7/22×2=r square + 15r
154=r square +15r
r square + 15r=154
968=2×22/7×r(r+15)
968×7/22×2=r square + 15r
154=r square +15r
r square + 15r=154
n after that?
ho to find out the radius
uts a quadratic equation and solve it
r square +22r-7r-154
r(r+22)-7(r+22)
(r-7)(r+22)
r=7 and r=-22
But -22 is negative so its not possible
The answer is 7
r(r+22)-7(r+22)
(r-7)(r+22)
r=7 and r=-22
But -22 is negative so its not possible
The answer is 7
br is next line avoid it
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