Volume of cylinder
v = πr²
v = 22/7 x 21²
v = 1385.441 cm³
10 km in .5 hour. Since it is the same as 20 km in 1 hour. Multiplied by 2.
20 is greater than 15.
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<em>Hi!</em>
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<em>These can be set up as systems of equations.</em>
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<em>Let b = the number of birds, and let d = the number of dogs.</em>
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<em>b + d = 21</em>
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<em>2b + 4d = 76 (this is because birds have 2 legs and dogs have 4 legs.)</em>
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<em>You can solve this using either elimination or substitution.</em>
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Answer:
Target distance is 4/5 miles
walked 2/5 miles and walked 1/4 miles
so distance need to walk is 3/20
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