A hall has the dimensions $10\,m \times 12\,m \times 14\,m.$A fly starting at one corner ends up at a diametrically opposite corner. What is the magnitude of its displacement...........$m$
$17$
$26$
$36$
$21$
A hall has the dimensions $10\,m \times 12\,m \times 14\,m.$A fly starting at one corner ends up at a diametrically opposite corner. What is the magnitude of its displacement...........$m$
Diagonal of the hall = $\sqrt {{l^2} + {b^2} + {h^2}} $
$ = \sqrt {{{10}^2} + {{12}^2} + {{14}^2}} $
$ = \sqrt {100 + 144 + 196} $
$ = \sqrt {440} = 20.97\approx 21 \,m$
$ = \sqrt {{{10}^2} + {{12}^2} + {{14}^2}} $
$ = \sqrt {100 + 144 + 196} $
$ = \sqrt {440} = 20.97\approx 21 \,m$
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