1. A boy travels 4 km towards south and then takes a left turn and travels another 3 km in that direction. How far and in which direction is he now from his original position?
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By: anil on 05 May 2019 02.17 am
Let the boy starts from point A and travels 4 km towards south to reach B and then takes a left turn and travels another 3 km east wards to finally reach point C. Thus, $$(AC)^2=(AB)^2+(BC)^2$$ => $$(AC)^2=(4)^2+(3)^2$$ => $$(AC)^2=16+9=25$$ => $$AC=sqrt{25}=5$$ km $$ herefore$$ He is 5 km in the south-east direction from his original position. => Ans - (B)
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