Question
A train route starts and goes 21 km North, then the
route turns towards West for 7 km, then it turns North for up to 10 km, and then a right turn where the route continues for 7 km to reach the end. Where is the end point with reference to the start point?Solution
The direction diagram is shown below: 
Clearly, the arrangement according to the given directions is as shown above. Therefore, the total shortest distance from the start point to the end point is (21 km + 10 km) 31 km in the North direction. Hence, the correct answer is (C).
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