Discussion
Two boys can mow a lawn in 2 hours and 30 minutes If they are joined by three other boys, how many hours will it take to mow the lawn?
*This question is included in Nova Math - Problem Set R: Ratio & Proportion, question #5
| (A) | 1 hr. |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 01/19/2014 19:20
Could you please explain with more detail?
Posted: 01/19/2014 20:44
1 lawn / (2 boys x 2.5 hours) = 1 lawn / (5 boys x n hours)
Solve for n.
Solve for n.