Question : Directions: Prem starts to walk to school from his house and walks 400 metres to the north turns left and walks 100 metres; turns left and walks 200 metres and then turns left and walks 100 metres. How far is he away from his house?
Option 1: 100 metres
Option 2: 300 metres
Option 3: 200 metres
Option 4: 250 metres
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Correct Answer: 200 metres
Solution : Firstly, we will draw the diagram as per the given instructions –
Now, we have to find the distance between the house and the endpoint.
In the above figure, O is the starting point and D is the finishing point. So, OD is the distance from the starting point. OD = OA – AD (AD = BC = 200) OD = 400 – 200 OD = 200 metres
So, Prem is 200 metres away from his house. Hence, the third option is correct.
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