In this question assume that all the men work for the same hours and at the same work rate.
A builder estimates 5 men would need 12 days to complete the job.
What would his estimate be for 4 men to complete the same job?
You must show your working.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

3x + 4y = 5 x- 3y = -7 solve by substitution