Question

3. An aeroplane flies 400 km due west from city A to city
then 300 lom north cast to city C. and finally 100 km north to ch
How far is it from city A to D? In what direction must the aeropl
had to return directly to city A from city D?​

Answer 1

Explanation:

First thing first: You are flying form point A ( origin) West 400 km (point B) and the North East 300 km (point C). Then you are going North 100 km (point D); Drop a line from point C to line AB, use sin(45) = x/300, ==> x = 212.1320344 km or 212 km.