SOLUTION: Charlotte walks to work every morning. It takes 40 minutes if she walks at 4.5 km/h. How long will it take her to cycle to work at a speed of 30 km/h?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Charlotte walks to work every morning. It takes 40 minutes if she walks at 4.5 km/h. How long will it take her to cycle to work at a speed of 30 km/h?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 607421: Charlotte walks to work every morning. It takes 40 minutes if she walks at 4.5 km/h. How long will it take her to cycle to work at a speed of 30 km/h?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

takes 40 minutes if she walks at 4.5 km/h.

How long will it take her to cycle to work at a speed of 30 km/h?



D = rt

Note: 4.5 = 9/2 and 40/60 = time in hrs

  %289%2F2%29%2840%2F60%29+=+30t

      360/120 = 30t

         3/30 = t

          .1hr = t = 6min