exam Maths Puzzle Numerical Ability

I am absolutely speechless with this problem. I have asked everyone I know and looked for help and nothing. Please help me.

The problem is:

V=(pi)R^2h-(pi)r^2h Solve for r^2

Read Solution (Total 0)

exam Other Question

I have gotten lost on this one please help.

For the equation x-sqrtx=0 , perform the following:
a) Solve for all values of x that satisfies the equation. Can you solve:

a^4-b^ over 2ab times 2a^2-ab-3b^2 over a^2+b^2