Answer:
I have no idea
Step-by-step explanation:
Answer:
It is not
Step-by-step explanation:
If 12 divided by 36 is 3 then multiply 15 by 3 to get 45 as the answer
A can do 1 job in 10 min. means 1/10 job per min.
B can do 1/15 job per min.
together A&B can do 1/10+1/15 =1/6 job per min.
1/6 job they spend 1 min
1 spend 1x1/(1/6) = 6 min