the sum of the radius of the base and the height of a solid cylinder is 37m. If the total surface area of the cylinder is 1628 m^2, find its volume

PLEASE HELP

Respuesta :

Answer:

4618.14[tex]m^{3}[/tex] or 4618[tex]m^{3}[/tex]  

Step-by-step explanation:

From  T.S.A = 2[tex]\pi[/tex]rh + 2[tex]\pi[/tex][tex]r^{2}[/tex]

 where T.S.A = 1628[tex]m^{2}[/tex]

           1628 = 2[tex]\pi[/tex]rh + 2[tex]\pi[/tex][tex]r^{2}[/tex]

            1628 =  ( rh + [tex]r^{2}[/tex] ) 2[tex]\pi[/tex]

 by dividing both side by 2[tex]\pi[/tex]

             [tex]\frac{1628}{2\pi }[/tex]=  rh + [tex]r^{2}[/tex]

          259.10 = rh + [tex]r^{2}[/tex]

           rh = 259.10 - [tex]r^{2}[/tex]

        h = [tex]\frac{259.10 - r^{2} }{r}[/tex]            (1)

From Radius + Height = 37

       r + h = 37                (2)

by substituting eqn 1 into 2

    r + [tex]\frac{259.10 - r^{2} }{r}[/tex]   = 37

by multiplying r to both side

   [tex]r^{2}[/tex] + 259.10 - [tex]r^{2}[/tex] = 37r

     259.10 = 37r

   r = [tex]\frac{259.10}{37}[/tex]

   r = 7.00 ≅ 7  

From Eqn 2

     r + h = 37

     7 + h = 37

     h = 37 - 7

     h = 30

so Volume of a cylinder = [tex]\pi r^{2} h[/tex]

                  V = [tex]\pi[/tex] * [tex]7^{2}[/tex] * 30

                  V = 4618.14[tex]m^{3}[/tex]  ≅  4618[tex]m^{3}[/tex]  

Answer:

920

Step-by-step explanation:

ACCESS MORE
EDU ACCESS