Question

At the Sunshine Bakery, 351 loaves of seven-grain bread were baked in six hours and 15 minutes. Estimate how many loaves were baked in one hour.

60
55
65
70

Answer 1

B) 55

Explanation:

given

351 loaves baked in 6 hrs and 15 min.

15 min x (1 hr / 60 min) = 0.25 hr

find:

Estimate how many loaves were baked in one hour.

its a ratio and proportion:

351 loaves = x loaves ( just cross multiply)

6.25 hr 1 hr.

x loaves = 351 loaves ( 1 hr.)

6.25 hr.

= 56 ------->>> say 55

Answer 2

B

Explanation:

We know that 351 loaves were baked in six hours and 15 minutes.

First, let's convert the time to minutes. 6 hours is 360 minutes, so 6 hours and 15 minutes is 360 + 15 = 375 minutes.

Therefore, we can write the following ratio:

`\frac{351\text{ loaves}}{375\text{ minutes}}`

We want to estimate how many loaves were baked in one hour or 60 minutes. So, we can write the following proportion:

`\frac{351\text{ loaves}}{375\text{ minutes}}=\frac{x\text{ loaves}}{60\text{ minutes}}`

Note that the loaves and time align horizontally, while the rates align vertically.

Since we're estimating, let's change 351 to 350 (I'm also going to remove the words, since they're not necessary). So:

`(350)/(375)=(x)/(60)`

We can reduce the left by dividing by 25. This yields:

`(14)/(15)=(x)/(60)`

Cross multiply:

`15x=60(14)`

Multiply and solve for x. So:

`15x=840\\\Rightarrow x=56\approx55\text{ loaves}`

Therefore, approximately 55 loaves were baked in one hour.

So, our answer is B.

And we're done!