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schepotkina [342]
3 years ago
6

Jamal started writing thank-you notes at 5:25. It took him 20 minutes to write them. He also spent some time writing addresses o

n the envelopes. He finished at 6:00. How long did it take Jamal to write the addresses?
Mathematics
1 answer:
chubhunter [2.5K]3 years ago
6 0

Answer: 10

Step-by-step explanation:

25 + 20= 45

45 + ? = 6:00

A= 15

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2 years ago
If he rows with the current, Mishka rows 48 km in 3 hours. If he rows against the current, it takes 4 hours to travel the same d
Zarrin [17]
<h2>Mishka's speed = 14 km/hr</h2><h2>Current speed = 2 km/hr</h2>

Step-by-step explanation:

Let the speed of rowing be r and speed of current be c.

If he rows with the current, Mishka rows 48 km in 3 hours.

        Relative speed = r + c

        Distance = 48 km

        Time = 3 hours

        48 = 3 x ( r+c)

        r + c = 16 ---------------------------eqn 1

If he rows against the current, it takes 4 hours to travel the same distance.

        Relative speed = r - c

        Distance = 48 km

        Time = 4 hours

        48 = 4 x ( r - c)

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eqn 1 + eqn 2

        2r = 28

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Substituting in eqn 1

         14 + c = 16

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Mishka's speed = 14 km/hr

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Pretty sure it is 16
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3 years ago
Read 2 more answers
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