A man drove his car northward,then turned left and drove 10km and again turned left and drove 20km.He found himself 10km west of his starting point.How far did he drive northward initially?
4 answers
20km
20
The driver formed a rectangle with 10 km
horizontal sides and 20 km vertical sides(northward).
horizontal sides and 20 km vertical sides(northward).
AB+BC+CD = AD
AB + (-10) + (-20i) = -10
AB = 20i = 20km Northward.
AB + (-10) + (-20i) = -10
AB = 20i = 20km Northward.
3 answers