Mathematics
Baileygraves
2016-04-18 18:24:21
eric kweeder can paint a wall in 20 mins. His brother Jessup can paint the same wall in 30 mins. How long will it take them working together?
ANSWERS
courtneyjordan
2016-04-18 22:32:02

We=1/20 Wj=1/30 Wt = 1/20+1/30 = 30/600 + 20/600 = 50/600 = 1/12 T= 1/rate = 1/(1/12) = 12 minutes. 

ADD ANSWER