The number of balls in box A is 1/2 of the number of balls in box B. 10% of the balls in Box A and 10% of the balls in Box B wer
e moved to Box C. As a result, the number of balls in Box C increased by 20%. There are 72 balls in Box C now. How many balls were there in Box B at first?
3/45 = 20/x...3 in to 45 seconds = 20 in to x seconds cross multiply (3)(x) = (45)(20) 3x = 900 x = 900/3 x = 300...300 seconds (or 5 minutes)to fill the tub with 20 inches