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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