Name: Duk

Who is asking: Parent Level: Middle

Question: Loren is laying decorative brick along both edges of the 21-meter walkway up to his house. Each brick is 0.26 meters long. He is placing the bricks end to end. How many bricks does he need to do the job?

I can do a quick estimate which will give an approximate answer. If each brick were 0.25 meters long, that is a quarter of a meter, then it would take 4 bricks to make a meter and hence 4  21 = 84 bricks on each side of the walkway. Thus 168 bricks in total.

Now lets do it more precisely. ²¹/_0.26 = 80.77 so it will take 81 bricks on each side of the driveway. This is quite close to my estimate so I feel confident that I have done the problem correctly.