Ranuka started walking from her house, she first walked for 3 km towards west, then she turned towards north and moved 4 km in that direction. How far is ranuka from her house?
3 km south
None of these
5 km west
5 km N-W
3 km S-E
Using pythagoras theorem,
Distance from House AB2 = BC2+ AC2
AB2 = 32 + 42
AB2 = 9 + 16 => 25
AB = 5 KM (North-West)