a man drove his car northward, then turned left and drove 10 km and again turned left and drove 20km. he found himself 10 km west of his starting point . how far did he drive northward initially

Question

a man drove his car northward, then turned left and drove 10 km  and again turned left and drove 20km. he found himself 10 km west of his starting point . how far did he drive northward initially

Reiny · Answer

done, see your previous post under a different name http://www.jiskha.com/display.cgi?id=1450075351

Harman · Answer

20 km