so 5 people work each one for 21 minutes, that means 21+21+21+21+21 minutes altogether, namely 105 minutes, it took that long for 7 walls, hmmmm how long for just one wall then? well, 105 ÷ 7, namely 15 minutes then, for just 1 wall.
now, if it takes 15 minutes of work to do one wall, what about 5 walls? well, that'd be 15*5 or 75 minutes.
so if we have 3 folks working, how much would each one work? well, 75 ÷ 3, namely 25 minutes, so each of them will work 25 minutes, namely 25+25+25 minutes, so in 25 minutes, they'll be done with 5 walls.
There are three possible results when a plan intersects with a three-dimensional figure and these are:
a point
a line
a plane
The first step in describing the result is to determine first how the plane and the figure intersects.
Answer:
9.7
Step-by-step explanation:
16.7 is the answer rounded to the nearest tenth.
