Question

F=140H h=20 м t=20 сек А=?

Answer 1

Если нужно найти A, то ответ – 2,8 кДж.
Решение на фотографии.

Answer 2

It seems like you're trying to find the value of "A" in a physics problem involving some variables F, H, h, t, and A. However, the exact context of the problem isn't clear. If you could provide more information or clarify the problem, I'd be able to help you better.