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If Lisa walks t blocks in 3 minutes, how many minutes will it take her

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Carcass
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If Lisa walks t blocks in 3 minutes, how many minutes will it take her [#permalink] New post   03 Dec 2021, 06:32
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If Lisa walks t blocks in 3 minutes, how many minutes will it take her to walk s blocks at the same rate?

A. \(\frac{s}{3t}\)

B. \(\frac{3s}{t}\)

C. \(\frac{3}{st}\)

D. \(\frac{3t}{s}\)

E. \(\frac{t}{3s}\)
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Re: If Lisa walks t blocks in 3 minutes, how many minutes will it take her [#permalink] New post   03 Dec 2021, 06:42
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Carcass wrote:
If Lisa walks t blocks in 3 minutes, how many minutes will it take her to walk s blocks at the same rate?

A. \(\frac{s}{3t}\)

B. \(\frac{3s}{t}\)

C. \(\frac{3}{st}\)

D. \(\frac{3t}{s}\)

E. \(\frac{t}{3s}\)

Rate = distance/time
So, if Lisa walks a distance of t blocks in a time of 3 minutes, then her RATE \(= \frac{t}{3}\) (blocks per minute)

We now want to determine the time it will take Lisa to walk he distance of s blocks at a rate of \(\frac{t}{3}\) (blocks per minute
Time = distance/rate
So, Lisa's time \(= \frac{s}{\frac{t}{3}} =(s)(\frac{3}{t})=\frac{3s}{t}\)

Answer: B
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Re: If Lisa walks t blocks in 3 minutes, how many minutes will it take her [#permalink]
03 Dec 2021, 06:42
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