On a business trip a salesman traveled 40 mph for the first third of the distance and 50 mph for the remainder of the distance. If the entire trip took 4 hours and 20 minutes, how many miles did he travel?
i think the total distance travelled is 200 miles... he travelled at 40mph for 1hr and 40 mins. and at 50 mph for the remaining time.
therefore distance travelled is
40*100(mins)/60+ 50*80/60+ 50*80/60 =400/6 + 400/6 + 400/6
= 1200/6
=200 miles..
400/6 is also the 1/3rd of the distance travelled... is it correct... correct me if i am wrong....