Respuesta :
Answer: 81 pound.
Step-by-step explanation:
A 1 foot reel of cable weighs:
[tex]\displaystyle\\\frac{90}{300} =\frac{3}{10}\ \frac{pound}{foot} .[/tex]
A 30 foot reel of cable weighs:
[tex]\displaystyle\\\frac{3}{10}*30=\\\\\frac{90}{10} =\\\\9\ pound.[/tex]
The weight of the remaining cable is:
[tex]90-9=\\\\81 \ pound.[/tex]
Answer:
81 lb
Step-by-step explanation:
30 feet is 1/10 of the length.....9/10 of the length remains...so does 9/10 of the weight
9/10 * 90 lb = 81 lb
