Question

A boy rides his bicycle Northward, then turned left and rode 1 km and again turned left and rode 2 km. He found himself 1 km west of his starting point. How far did he ride northward initially?
(A) 1 km
(B) 2 km
(C) 3 km
(D) 5 km

Answer 1

(B) 2km is your perfect answer because it forms a rectangle. So opposite sides are equal.