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put this solution on YOUR website!The 5th little piggy ran all the way at two different rates. First, she ran at 8 mph for the first third of the trip, but soon got tired and slowed down to 5 mph for the rest of the two mile trip. Find how many minutes it took the little piggy to get home.
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It states the total distance as 2 mi with 1/3 of that distance ran at 8 mph,
and 2/3 at 5 mph
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Distance at 8 mph, 1/3(2) = 2/3 mile
Distance at 5 mph, 2/3(2) = 4/3 mile
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They want the time in minutes, convert given speed to mile per min
8 mph = 8/60 = 2/15 mi per min
5 mph = 5/60 = 1/12 mi per min
:
Time = dist/speed:
:
Total Time = time at 8 mph + time at 5 mph
T =[(2/3)/(2/15)] + [(4/3)/(1/12)]
T = (2/3 * 15/2) + (4/3 * 12/1); invert and multiply
T = (15/3) + (4*4)
T = 5 + 16
T = 21 min total time
