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QveST [7]
2 years ago
7

There were 20 apples in the bag. Rachel used 2/5 of the apples for a pie. Her

Mathematics
1 answer:
dimulka [17.4K]2 years ago
4 0
Answer : 2 apples

Step by step explanation:
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It takes 32 hours for a motorboat moving downriver to get from pier A to pier B. The return journey takes 48 hours. How long doe
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Answer:

Time taken by the un powered raft to cover this distance is T = 192.12 hr

Step-by-step explanation:

Let speed of boat = u \frac{km}{hr}

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Time taken in downstream = 32 hours

32 = \frac{100}{u +v}

u + v = \frac{100}{32}

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Time taken in upstream = 48 hours

48 = \frac{100}{u -v}

u -v = \frac{100}{48}

u - v = 2.084 ------- (2)

By solving equation (1) & (2)

u = 2.6045 \frac{km}{hr}

v = 0.5205 \frac{km}{hr}

Now the time taken by the un powered raft to cover this distance

T = \frac{100}{v}

Because un powered raft travel with the speed of the current.

T = \frac{100}{0.5205}

T = 192.12 hr

Therefore the  time taken by the un powered raft to cover this distance is

T = 192.12 hr

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