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Gnom [1K]
3 years ago
7

Jonathan fills 2/5 of a toffe box in 15 seconds. How many boxes can he fill in 10 minutes?

Mathematics
1 answer:
Zina [86]3 years ago
8 0

Answer:

16 boxes in 10 minutes

Step-by-step explanation:

2/5 = 15 sec

15 ÷ 2=7.5              1/5 = 7.5 seconds

7.5 × 5 = 37.5            37.5 = 1 box

60 × 10 = 600 secs

600 ÷ 37.5 = 16

16 boxes of toffee were made in 10 minutes

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A cube has volume 15 625 cm3. what is the surface area of the cube?
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<span>SA=3750c<span>m<span>2
</span></span></span>

The volume of a cube is determined by the formula
<span>V=<span>s3</span></span> where s is the measurement of each edge.

Since cube has six square faces, each of the faces will have the area of a square which we know to be <span>A=<span>s2</span></span>. Therefore the total surface area of a cube will be the area of a square multiplied by six (faces).

<span>SA=6<span>s2</span></span>

Solving for the length of edge (side):

<span>V=<span>s3</span></span>

<span>s=<span>3<span>√V</span></span>=<span>3<span>√<span>15625c<span>m3</span></span></span></span></span>

<span>s=25cm</span>

Solving for the surface area:

<span>SA=6<span>s2</span>=6<span><span>(25cm)</span>2</span></span>

<span>SA=3750c<span>m<span>2</span></span></span>
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3 years ago
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