A) 100
B) 105
C) 225
D) 250
Correct Answer: C
Solution :
(c): Let the number of pages in the book be x. \[\frac{2x}{5}+\frac{2x}{5}\left( \frac{x}{3}\times \frac{2}{5} \right)+15=x\] \[\Rightarrow \frac{4x}{5}+\frac{2x}{15}+15=x\] \[\Rightarrow \frac{12x+2x+225}{15}=x\] \[\Rightarrow 14x+225=15x\] \[\Rightarrow 15x-14x=225\] \[\therefore x=225\]You need to login to perform this action.
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