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3 years ago

A runner ran 2/3 of a 5 kilometer race in 21 minutes. They ran the entire race at a constant speed.

2 answers:

7 0

A)
distance covered
5*2/3 = 3.333
time taken = 21min
this means it takes
5*<span>6.306 = 31.53 to covers 5 km
b) </span><span>21min/3.33 = 6.306 time taken to ran 1 km</span>

ankoles [38]3 years ago

3 0

Answer:

it take 31.53 minutes to run the entire race

it take 6.3 minutes to run the 1 km

Step-by-step explanation:

A runner ran 2/3 of a 5 kilometer race in 21 minutes. They ran the entire race at a constant speed.

$\frac{2}{3} \cdot 5= \frac{10}{3}$

3.33 km is covered in 21 minutes

So 5 km is covered in $\frac{5 \cdot 21}{3.33}=31.53$ minutes

it take 31.53 minutes to run the entire race

$\frac{10}{3}$ km is covered in 21 minutes

1 km is covered in $\frac{21}{\frac{10}{3} } =6.3$

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3 years ago

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Given:

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