4 people paint 8 walls in 60 minutes
1 person paints 8 walls in 240 minutes
1 person paints 1 wall in 30 minutes
5 people paint 1 wall in 6 minutes
5 people paint 4 walls in <em>24 minutes</em>
Solution: Let 
be the number of birds and 
be the number of cats.
Therefore, there were 14 birds at the shelter on Friday
Answer: 78 rupees
Explanation: since 10 pens cost 60 rupees you can divide 60 by 10 to get the cost of a single pen. The cost of a single pen is 6 rupees so you can multiply that by 13 to find the cost of the 13 pens.
10p=60
60/10=6
p=6
so
13x6=78
Hope this helped! :)
