Among four bags, average weight of last three bags is 18 kg and the average weight of first three bags is 19 kg. If the weight of last bag is 22 kg, then what is the weight (in kg) of first bag?
An eagle starts from its nest and flies 1 km East, the turns North and flies 2 km, then turns West and flies 7 km, then turns to its left and flies 2 km. Where is it now with respect to its nest?