3. An airplane flies 105 miles in ½ hour. How far can it fly in 1 ¼ hours at the same rate of speed?
2 answers:
Answer:
105 at 30 min.
<em>x</em> at 75 min.
105 mph x 2 = 210 mph at one hour
There is still 15 min to go soooo...
210/4 = 52.5
210 + 52.5 = 262.5 mph for 75 min
Check by dividing
262.5/75=3.5
262.5 miles
explanation 1/4 is half of 1/2 so 52.5 is half of 105 and then 210 for an hour of travel
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