Following is a diagram of the shirtcleaning process used by

Following is a diagram of the shirt-cleaning process used by the Floods of Suds One-Day Laundry Services, Inc. The shirts are soaked in an agitated tub containing Whizzo, the Wonder Detergent, and are then wrung out and sent to a rinse stage. The dirty Whizzo is sent to a filter in which most of the dirt is removed, and the cleaned detergent is recycled back to join a stream of pure Whizzo, with the combined stream serving as the feed to the washtub. Data: 1. Each 100.0 lbm of dirty shirts contains 1.00 lbm of dirt. 2. The washing removes 85.0% of the dirt in the dirty shirts. 3. For each 100.0 lbm of dirty shirts, 23.0 lbm of Whizzo leaves with the clean shirts, of which 22.0 lbm is wrung back into the tub. 4. The detergent that enters the tub contains 97.0% Whizzo, and that which enters the filter contains 75.0%. The wet dirt that leaves the filter contains 8.00% Whizzo. Questions: a. How much pure Whizzo must be supplied per 100.0 lbm of dirty shirts?

Solution

1.Here we have supplied 23lbm powder

2.Out of whch 97%is enter into tub 23 [.93%] =22.31lbm

3.Out of 22.31of whizzo 75% enter in to filter that is 16.7325

4.Out of 16.7325 of whizzo 8%is wasted that is 1.3386 is wasted

16.7325-1.3386 =15.3939lbm is reused that is remining is used for washing

5.that is 23-15.3939 =7.6061 is utilised for washing so this is the quantity must added for washing 100.0lbm clothes