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ddd [48]
3 years ago
6

Adam bakes another cake the same size as the first, but he cuts his cake into 40 equal-sized pieces. The height of each piece if

3 cm. long. Explain how you can determine the possible length and width of each piece of the second cake. Use words/numbers to justify your answer.
Info that you need:
The first cake had an area of 1,800 cm.
The first cake was divided into 24 pieces. (Each piece had an area of 75 cm.)

How would you solve this? Please help!
Mathematics
1 answer:
Strike441 [17]3 years ago
6 0
I believe you mean volume, not area, since the height is given as well.

If the first cake and the second cake are the same size, they'd have the same area and the same volume.

Ratio between 1st pieces and 2nd pieces:
24:40 = 6:10
          = 3:5

So for every 3 pieces from the first cake, you get 5 pieces from the second cake. 

Therefore, your volume of each piece of the second cake should be 45 cm^3. 

Since the height is given as 3 cm, the area of each piece of the second cake should be 15 cm^2. (45/3 = 15)

Working with whole numbers (i'm assuming), the possible dimensions of the second cake pieces would be: 5 cm x 3 cm x 3 cm (and since 3 and 5 are the only integer factors of 15).  

Your answer: width x length = 5 cm x 3 cm (or vice versa)
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