If George and Howard work together, they can complete a job in 12 days. If George and Howard worked together for 6 days, followed by Howard who worked alone for the next 24 days, they can finish off the job.
- How many days would Howard need to complete the job alone?
- How many days would George need to complete the job alone?
(a)
Time taken by George and Howard if they work together:
12 days → 1 job
1 day →
112 job
6 days →
612 =
12 job
Time taken by Howard if he works alone:
24 days → 1 -
12 =
12 job
1 day →
12 ÷ 24 =
12 x
124 =
148 job
1 job → 48 days
(b)
Time taken by George if he works alone:
1 day →
112 -
148 =
348 =
116 job
116 job → 1 day
1 job → 1 ÷
116 = 16 days
Answer(s): (a) 48; (b) 16