Question

find the diameter of the sphere whose surface area is 154m​

Answer 1

Answer:

area of sphere is 4πr²

4πr² = 154 m²

πr²=154/4

r = √154/4π

r = 9.7m

diameter = 2r

diameter = 2× 9.7

diameter = 19.4 m

JAI SHREE KRISHNA

Answer 2

Answer:

The answer will be 7 m.

Step-by-step explanation:

Given ;

            Surface area of the sphere  = 154m^2;

Now we know that surface area of a sphere is;

                                               = 4π$r^{2}$;

Now, equate all the values;

                          4π$r^{2}$ = 154m^2;

                          4 * (22/7) (r^2) = 154;

                          r^2 = (154 * 7) / (22 * 4);

                          r^2 =  $\sqrt{ 12 .25}$;

                          r = 3.5 m;                (i)

Now, the diameter will be;

                             = 2 r;

                             = 2 (3.5);              (from equation (i))

                             = 7 m;

That's all.