मोनू अपने घर से पूर्व की ओर 6 किमी यात्रा करने के बाद महसूस करता है कि उसने गलत दिशा में यात्रा की है। वह वापस मुड़ा और पश्चिम की ओर 12 किमी यात्रा की, फिर दाईं ओर मुड़ा और अपने कार्यालय पहुँचने के लिए 8 किमी की यात्रा की। उसके घर से कार्यालय की सीधी दूरी कितनी है?

Suraj starts driving from point A and drives 4 km towards the East. Then he turns right and drives 6 km to reach point B. Parveen starts driving from point X, which is 3 km East of point B, and drives 5 km towards South. Then he turns right and drives 7 km to reach point Y. Find the shortest distance between point Y and point A. (All turns are 90-degree turns only)

Mr. DEF starts from Point A and drives 16 km towards the north. He then takes a right turn, drives 21 km, turns right and drives 13 km. He then takes a left turn, drives 15 km, turns right and drives 22 km. He then takes a right turn and drives 54 km. He takes a final right turn, drives 19 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again?