SinA=8/17, so arcsin(8/17) is your angle of A (around 49 degrees). 90-A is your angle for B
I’m not sure but i think 66 hours because both pumps must fill half of the pool which would split the timing for each which would make pump 1 take 36 hours to fill half and pump two take 30 hours to fill the rest. when you add these hours it equals 66. i hope i helped :)
