It will take 18 days for Cameron to complete a certain task alone. He worked for 9 days before she was joined by Sandra. both of them completed the remaining task in 3 and half days. how many days will it take both of them to complete the entire job? Options
A) 6 B) 7 C) 5 D) 8 E) 9
Explanation:   Cameron and Sandra completed half work in 3.5 days   =&gt; they can complete whole work in 7 days   Answer: Option 7
<result>B</result>
It will take 18 days for Cameron to complete a certain task alone. He worked for 9 days before she was joined by Sandra. both of them completed the remaining task in 3 and half days. how many days will it take both of them to complete the entire job?