A) 54
B) 64
C) 74
D) 84
Correct Answer: D
Solution :
As, \[{{n}_{1}}\frac{D{{n}_{1}}}{d}={{n}_{2}}\frac{D{{n}_{2}}}{d}\] \[{{n}_{1}}{{n}_{1}}={{n}_{2}}{{n}_{2}}\] \[{{n}_{2}}=\frac{{{n}_{1}}{{n}_{1}}}{{{n}_{2}}}\approx 84\] (Here, \[{{n}_{1}}{{n}_{1}}\] and \[{{n}_{2}}{{n}_{2}}\] are known).You need to login to perform this action.
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