Since the top of the person's head is above the water (by 1.6 feet), that means the water is less than 5.8 feet (the person's height). So we have to subtract 5.8 - 1.6, and I believe the answer will be 4.2 feet. The pool is 4.2 feet deep :)
First multiply 5.7 by 5 2/3 to figure out how long the adult ride is: 5.7/1 X 17/3= 32.3. Then add the adult ride and the children's ride together: 5.7+32.3=38 (7+3=10 which adds 1 to the whole number). The mom would ride 38 miles :)
