Question

T. S. A of cylinder is 231cm2 if the height is four times of the radius find. the height of the cylinder​

Answer 1

Hey mate here you have to consider radius be x
and HT. be 4x

and then put it in the formula,
231cm^2=2×π×x(x+4x)
231cm^2=2×22/7×x×5x

Now solve it the value of x obtained would be radius and then multiply with 4×x and value obtained would be the height.....

Answer 2

Answer:tsa of cylinder=2πr(r+h )

231= 2×3.14(x+x×4)

231=6.28×5x

231=31.40x

231/31.40=x

x=7.3566

x=7.36