Question

help for 20 stars. Karen started painting the walls at 9:25 am, and she said that she would finish the job at 2:35 pm. Her mother said that three fourths of that time was enough to paint the walls. However, when Karen finished the job, they noticed that it actually took her 2/3 of an hour longer than the time predicted by the mother. How much longer did Karen predict it would take then the time it actually took her to complete the job (what part of an hour)?

Answer 1

Karen started painting the walls at = 9.25 am

she said that she would finish the job at = 2:35 pm

So, she predicted a total of = 5 hours 10 minutes or 310 minutes

Her mother said that three fourths of that time was enough to paint the walls= $\frac{3}{4}\times310= 232.5$ minutes

When Karen finished the job, they noticed that it actually took her 2/3 of an hour longer than the time predicted by the mother.

$\frac{2}{3}\times60=40$ minutes so it is=$232.5+40=272.5$ minutes

So, Karen predicted $310-272.5=37.5$ minutes extra

To find it in hours= $\frac{37.5}{60}= 0.625$ or in fractions it is $\frac{5}{8}$ of an hour

Answer 2

Answer:

Starting time for painting =9.25 am

Predicted time to finish the job i.e painting=2:35 pm

So, total time taken= i.e time between 9:25 am to 2:35 pm=5 hours 10 minute

                                                           = 310 minute

Time predicted by her mother=$\frac{3}{4}\times310$

                                                =232 minutes 30 seconds

Actual time taken = Time predicted by her mother+Extra time(2/3 of 1 Hour)

                              = 232 minutes 30 seconds + 40 minutes

                               = 272 minutes 30 seconds

Difference in time=Time predicted by karen - Actual time taken

                               =310 minute-272 minutes 30 seconds

                                 = 37 minutes 30 seconds

Converting the result in hour= $\frac{75}{2\times60}$

                                              = 5/8 hour