A) \[0.2\,{{R}_{e}}\]
B) \[2\,{{R}_{e}}\]
C) \[0.5\,{{R}_{e}}\]
D) \[5\,{{R}_{e}}\]
Correct Answer: D
Solution :
Range of projectile\[R=\frac{{{u}^{2}}\sin 2\theta }{g}\] if u and q are constant then \[R\propto \frac{1}{g}\] \[\frac{{{R}_{m}}}{{{R}_{e}}}=\frac{{{g}_{e}}}{{{g}_{m}}}\Rightarrow \frac{{{R}_{m}}}{{{R}_{e}}}=\frac{1}{0.2}\Rightarrow {{R}_{m}}=\frac{{{R}_{e}}}{0.2}\]Þ \[{{R}_{m}}=5{{R}_{e}}\]
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