A postman walked 20 m straight from his office, turned right and walked 10 m. after turning left he walked 10 m and after turning right walked 20 m. he again turned right and walked 70 m. how far he is from his office ? (a) 50 m. (b) 40 m. (c) 60 m. (d) 20 m.
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The answer is a. 50 m
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