Question
Edie can paint a wall in 3 hours. Dan can paint the same wall in 6 hours. If they work together, how many hours will it take Edie and Dan to paint the wall?
(1 point)
Responses
1 hour
1 hour
1.5 hours
1.5 hours
2 hours
2 hours
4.5 hours
2 hours
Explanation: To find how long it would take for Edie and Dan to paint the wall together, you can use the formula:
1/(time taken by Edie) + 1/(time taken by Dan) = 1/(time taken by both)
1/3 + 1/6 = 1/x
2/6 + 1/6 = 1/x
3/6 = 1/x
1/2 = 1/x
x = 2
Therefore, it would take Edie and Dan 2 hours to paint the wall together.