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Question
A cow entered a grazing field. First it moved 10 m southwards, then it turned right and walked 5 m and turned right and grazed 10 m and turned left and walked 10 m. How many meters is she away from the starting point?
A
10 m.
B
15 m.
C
20 m.
D
25 m.
Soln.
Ans: b

Ans: b
A is the starting point in the figure below.

Required diastance from home, A = AE = AD + DE = BC + DE = 5 m + 10 m = 15 m.