Question

Please help to the best of ur ability plz

Answer 1

She went 3.5 feet per second down for 90 seconds
3.5*90 = 315 feet below
2.2*30 = 66 feet up
315-66 = 249 feet below.

So, she must go up at 4.8 feet per second.
249/4.8 = 51.875 seconds
52 seconds when rounded