A hall has the dimensions 10 m × 10 m × 10 m. A fly starting at one corner ends up at a diagonally opposite corner. The magnitude of its displacement is nearly
A
5 
m
m
B
10 
m
m
C
20 
m
m
D
30 
m
m
Text Solution
Verified by ExpertsThe correct answer is:
B
Dimension of hall, length of any side = 10 m = a (say)
Magnitude of displacement = Length of diagonal = a 
= 10 
m
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