Radha walks 2 km south, turned right and walked 1 km, turned North and walked 5km, turned East and walked 5km. How far is he from the starting point? 3 km Options 7 km 5 km 6 km
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Answer:
Suppose Amit starts travelling from origin.
He travels 2 km South, then 1 km West, then 5 km North and finally 5 km East.
So, he makes a right angle triangle ABC from origin with base BC =3 km and side AB =4 km.
∴ by Pythagoras Theorem,
AB
2
+ BC
2
= AC
2
.
4
2
+3
2
= AC
2
∴ AC=5 km.
Hence, Amit is 5 km far from the starting point.
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by Pythagoras theram
Asume the line as much as you want , don't measure with the scale
prefer these above pics
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