If it takes 63 minutes for 4 people to paint 9 walls, how many minutes does it take for 7 people to paint 4 walls ?

49 minutes

Step-by-step explanation:

knowing that the more people, the lower the time (divide), and the more walls, the more time (multiply)

1. find how long it takes 1 person to paint 1 wall:

63 minutes/9 walls = 7 minutes/wall with 4 people

7 minutes * 4 people = 28 minutes/wall with 1 person

2. Find for 7 people and 4 walls: 28 minutes * 7 people/4 walls = 196/4 =

49 minutes

your answer is 228

step-by-step explanation:

add the top and bottom bases together, then divide them by 2, then multiply by the height.