Rectangular slabs for laying out the track have dimensions of 18 dm and

Rectangular slabs for laying out the track have dimensions of 18 dm and 5 dm. How many slabs do you need to lay a track 900m long and 180cm wide?

We convert the dimensions of rectangular slabs to meters.

18 dm = 18/10 = 1.8 m.

5 dm = 5/10 = 0.5 m.

Determine the area of one slab.

We multiply its sizes by each other.

1.8 * 0.5 = 0.9 m2

180 cm = 180/100 = 1.8 m.

Determine the area of the track.

900 cm = 900/100 = 9 m.

Find the surface area of the track.

9 * 1.8 = 16.2 m2

To find the number of slabs, you need to divide the area of the track by the area of one slab.

We get:

16.2 / 0.9 = 18 slabs.

Answer: You will need to lay out 18 plates.