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Xóchitl, who has already warmed up, immediately starts to pedal at a rate of 
18(km)/(h) on a stationary bike.
She sees that her friend Cowessess has already pedaled 12 minutes at an average rate of 
10(km)/(h).
Assuming Cowessess's rate stays the same, how long would Xóchitl have to pedal to catch up to Cowessess's distance?
minutes

Xóchitl, who has already warmed up, immediately starts to pedal at a rate of 18kmh18\frac{\text{km}}{\text{h}} on a stationary bike.\newlineShe sees that her friend Cowessess has already pedaled 1212 minutes at an average rate of 10kmh10\frac{\text{km}}{\text{h}}.\newlineAssuming Cowessess's rate stays the same, how long would Xóchitl have to pedal to catch up to Cowessess's distance?\newlineminutes

Full solution

Q. Xóchitl, who has already warmed up, immediately starts to pedal at a rate of 18kmh18\frac{\text{km}}{\text{h}} on a stationary bike.\newlineShe sees that her friend Cowessess has already pedaled 1212 minutes at an average rate of 10kmh10\frac{\text{km}}{\text{h}}.\newlineAssuming Cowessess's rate stays the same, how long would Xóchitl have to pedal to catch up to Cowessess's distance?\newlineminutes
  1. Calculate Cowessess's Distance: Calculate the distance Cowessess has already covered.\newlineCowessess's rate = 10km/h10 \, \text{km/h}\newlineCowessess's time = 1212 minutes = 1260\frac{12}{60} hours (since there are 6060 minutes in an hour)\newlineDistance = Rate ×\times Time\newlineDistance Cowessess has covered = 10km/h×(1260)h10 \, \text{km/h} \times \left(\frac{12}{60}\right) \, \text{h}\newlineDistance Cowessess has covered = 10km/h×0.2h10 \, \text{km/h} \times 0.2 \, \text{h}\newlineDistance Cowessess has covered = 2km2 \, \text{km}
  2. Calculate Xóchitl's Time in Minutes: Determine how long it will take Xóchitl to cover the same distance.\newlineXóchitl's rate = 18km/h18 \, \text{km/h}\newlineDistance Xóchitl needs to cover = Distance Cowessess has covered = 2km2 \, \text{km}\newlineTime=DistanceRate\text{Time} = \frac{\text{Distance}}{\text{Rate}}\newlineTime Xóchitl needs = 2km18km/h\frac{2 \, \text{km}}{18 \, \text{km/h}}\newlineTime Xóchitl needs = 19\frac{1}{9} hours
  3. Calculate Time in Minutes: Convert Xóchitl's time from hours to minutes.\newlineTime in minutes = Time in hours ×60\times 60 minutes/hour\newlineTime Xóchitl needs in minutes = 19h×60\frac{1}{9} \, h \times 60 minutes/hour\newlineTime Xóchitl needs in minutes = 609\frac{60}{9} minutes\newlineTime Xóchitl needs in minutes = 6.6666.666\ldots minutes
  4. Round Time to Nearest Minute: Round the time to a value that makes sense in the context of the problem.\newlineSince we cannot have a fraction of a minute in this context, we can round the time to the nearest whole minute.\newlineTime Xóchitl needs in minutes = 77 minutes (rounded up from 6.666...6.666... minutes)

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