Question

If 64 feet of rope weigh 20 pounds, how much will 80 feet of the same type of rope weigh?

Answer 1

Answer: 40

Explanation:

64:20= 8:4

8:4=80:x

Multiply the insides with the insides and the outsides with the outsides

320=8x

Answer 2

Weight of 80 feet rope = 25 pounds

Explanation:

Weight of 64 feet rope = 20 pounds

Weight of 1 feet rope = 20/64 = 5/16 {giving by 5th table}

Weight of 80 feet rope = 5 * 80 / 16

= 5 * 5

= 25 pounds