Aboy swims down stream at 0.9 miles in the same amount of time that he can swim 0.6 miles up stream. if the rate of the current is 1.5 mph, how fast can he swim in the water?

With #! i’ve tried to figure it out but i can’t.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)