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A cow walks 40 m east to rest under a tree. Later, she walks 25 m north to eat a patch of clover. What is the magnitude of her displacement?

A31.2 m
B47.2 m
C65 m
D90 m

Verified Answer :

Alpha111803

B 47.2m displaced
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This is a right triangle so use the a^2 + b^2 = c^2
40^2 + 25^2 = c^2
1600 + 625 = c^2
2225 = c^2
c = 47.17  or C

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