Question 20

Abhinav started running from his house, he first ran for 12 km towards east, then he turned towards north and ran 16 km in that direction. How far Abhinav is from his house and in which direction?

Solution

Let Abhinav started from A and ran for 12 km towards east, then he turned towards north and ran 16 km in that direction to reach C.

=> $$(AC)^2=(AB)^2+(BC)^2$$

=> $$(AC)^2=(12)^2+(16)^2$$

=> $$(AC)^2=144+256=400$$

=> $$AC=\sqrt{400}=20$$ km

$$\therefore$$ Abhinav is 20 km from his house and in north-east direction.

=> Ans - (D)

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