A husband and wife can complete a certain task in 2 and 3 hours respectively. Their children, Rae and Herman, can complete the same task in 4 and 6 hours, respectively. What is the ratio of the couple's time working together to complete the task to the children's time working together to complete the task?  Pick one: A) a)15:46 B) b)1:2 C) c)12:23 D) d)5:18 E) e)10:3
couples one hour work=1/2+1/3=5/6   so total time=6/5..   now, kids one hour work=1/4+1/6=5/12   so total time=12/5..   ratio=6/5:12/5=1/2   ans b)1:2
<result>B</result>
A husband and wife can complete a certain task in 2 and 3 hours respectively. Their children, Rae and Herman, can complete the same task in 4 and 6 hours, respectively. What is the ratio of the couple's time working together to complete the task to the children's time working together to complete the task?