Ireally need !
a sphere of metal with diameter 8cm is melted down.
it is then formed in to a trapezoidal prism as shown below.
the cross-sectional area (a) is 10cm2. what is the depth of trapezium? volume of a sphere=4/3 πr³
surface area of a sphere = 4πr²

Fun.  

The volume of the prism is just going to be the base area A times the depth x.

That's equal to the volume of the sphere.

We have r=8/2=4, A=10.

The exact answer is

128π/15  cm

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.