Question

A pencil manufacturer uses 5,376 grams of rubber to make 960 pencils. If they use 64,512 grams of rubber an hour, how many pencils are made per hour?

A) 11,420 pencils per hour
B) 11,480 pencils per hour
C) 11,520 pencils per hour
D) 11,580 pencils per hour

Answer 1

This answer would be C because I had worked out answer good

Answer 2

For this case, we look for the number of pencils per gram of rubber.

`\frac {960} {5,376} = 0.178571428571`

0.178571428571 pencils per gram of rubber are made

We are looking for the number of pencils per hour.

`0.178571428571 \frac {penc} {g} * 64,512 \frac {g} {h} = 11,520 \frac {pen} {h}`

Thus, 11,520 pencils per hour are made.

Answer:

Option C