What is the answer 4/3 * pi times 7.5 squared for a spear

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.