A) 12.5 m/s
B) 250 m/s
C) 31.25 m/s
D) 40 m/s
Correct Answer: D
Solution :
R angle=\[=\frac{{{u}^{2}}\sin 2\theta }{9}=200m\] Or \[\frac{{{u}^{2}}(2\sin \theta \cos \theta }{9}=200m\] ?.(1) Flight time\[=\frac{2u\sin \theta }{9}=5\text{ }\sec \] ... (2) From equation (1) and (2) \[u\cos \theta =40m/s\]You need to login to perform this action.
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