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You returned home from mowing lawns at 3:00 pm on Saturday. It took 1 1/2 hours to mow the first lawn. It took twice as long to mow the next lawn. After a half-hour lunch break, it took 1 4 hours to mow one more lawn. At what time did you start mowing the first lawn?

 Jan 16, 2020
 #1
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first lawn  =   1. 5 hours

second lawn  =  (2) (1.5)  = 3 hrs

lunch break  =  .5 hours

last lawn  = 1. 4 hrs

 

So

 

(1.5 + 3 + .5 + 1.4)   = 

 

6.4 hours before  3 PM  =

 

.4 hrs =  (4/10)(60)  = 240/10  = 24 min

 

6 hours +   24 min before 3 PM  =

 

8 : 36  AM ⇒   time you started  

 

 

cool cool cool

 Jan 16, 2020

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