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4 votes
4 votes
Scott likes to run long distances. He can run 20 \text{ km}20 km20, start text, space, k, m, end text in 858585 minutes. He wants to know how many minutes (m)(m)left parenthesis, m, right parenthesis it will take him to run 52 \text{ km}52 km52, start text, space, k, m, end text at the same pace.

How long will it take Scott to run 52 \text{ km}52 km52, start text, space, k, m, end text?

User Tlayton
by
2.6k points

1 Answer

20 votes
20 votes

Given:

Scott can run 20 km in 85 minutes.

To find:

How long will it take Scott to run 52 km?

Solution:

Let x be the number of minutes it will take him to run 52 km.

We know that,


Speed=(Distance)/(Time)

Using this formula, we get


Speed=(20)/(85) ...(i)


Speed=(52)/(x) ...(ii)

Equating (i) and (ii), we get


(20)/(85)=(52)/(x)


20* x=52* 85


20x=4420

Divide both sides by 20.


x=(4420)/(20)


x=221

Therefore, it will take 221 minutes to run 52 km.

User Nouar
by
2.9k points