Question

Tammy and Jodi assembled 420 circuit boards in 8 hours. The next day they assembled 36 more circuit boards in the same amount of time. What was their average rate on the second day? A. 87 boards per hour B. 70 boards per hour C. 57 boards per hour D. 36 boards per hour

Answer 1

1st day
8 hours = 420 circuits

2nd day
8 hours = 420 + 36
= 456 circuits

Average = 456/8
= 57 circuits per hour

Option C. Is the right answer