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jek_recluse [69]
3 years ago
14

Please help me with all of them or at least 2 of them? Thank you so much.

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
6 0
First one is 3/8>1/3
Second one is B
Third one is C
Fourth one is B

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Answer:

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Step-by-step explanation:

Given

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So the time Dina taken to complete the track is:

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The time taken by Dina is 2 hours. As masha started with dina but she was 4 km of the path left to cycle,

her distance covered in 2 hours was:

Distance\ covered\ by\ Masha\ in\ 2\ hours=20-4\\=16 km

So we know the time and distance:

Now,

Speed\ of\ Masha=\frac{distance}{time}\\ =\frac{16}{2}\\ =8\ kilometer\ per\ hour

We have to calculate the time that will be needed by MAsha to complete the track:

As we know the speed and remaining distance

Speed=\frac{distance}{time}\\8=\frac{4}{time}\\ time=\frac{4}{8}\\time=0.5\ hours

Masha needs 0.5 hour to complete the track ..

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