Q.

A person goes 10 km north and 20 km east. What will be displacement from initial point?

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a

22.36 km

b

2 km

c

5 km

d

20 km

answer is A.

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Detailed Solution

AC→ = AB→ +BC→AC = (AB)2+(BC)2     = (10)2+(20)2     = 100+400 = 500     = 22.36 km
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A person goes 10 km north and 20 km east. What will be displacement from initial point?