An airplane flies 400 km west from city A to city B, then 300 km northwest to city C, and finally 100 km north to city D. How far is from city A to city D? In what direction must the airplane head to return directly to city A from city D?
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1)according to questions airplanes goes A to B city = 400km west.
2)city C= 300km northwest
3)city D= 100km north
so from A to city D how far goes
city C+cityD= 300 + 100= 400
Ato B= 400+ 400 as the answer come
800km then subtracting C and D city
300+100-800
400km to north
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