Question : Directions: Karthik travelled 3 km east, then took a right turn and travelled 4 km. How far is he from the starting point?
Option 1: 5 km
Option 2: 15 km
Option 3: 3 km
Option 4: 7 km
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Correct Answer: 5 km
Solution : Firstly, we will draw the diagram as per the given instructions –
Here, AB = 3 km and BC = 4 km
AC is the distance between the starting and the finishing point.
By applying the Pythagoras theorem –
⇒ (AC)
2
= (AB)
2
+ (BC)
2
= (3)
2
+ (4)
2
= 9 + 16 = 25
⇒ AC = √25 = 5 km
So, Karthik is 5 km away from the starting point. Hence, the first option is correct.
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