4 years ago

Keela can read 2/7 of a book in 3/4 of an hour. How long will it take her to read one full book

Mathematics

1 answer:

GuDViN [60]4 years ago

5 0

Answer:

2 hours and 37.5 mins

I think

Step-by-step explanation:

2/7 : 3/4

divide both sides by 2

1/7 : 3/8

multiply both sides by 7

1 : 21/8

simplify

1 : 2 5/8

change 2 5/8 to hours and mins

2 hours and 37.5 mins

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Andrei [34K]

We have a right triangle.
Then:
A+B+C=90
Data:
C=90º
A=53º

Therefore:
53º+B+90º=180º
B=180º-53º-90º
B=37º

Answer: B=37º

To check:
Cos 37º=0.79863551...≈0.7986

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Step-by-step explanation:

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Step-by-step explanation:

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