1) If 4/5 of an estate be worth Rs. 16,800, then the value of 3/7 of the estate is : A) Rs- 9000 B) Rs. 21,000 C) Rs. 72,000 D) Rs. 90,000 Answer: Option AExplanation:Let the estate worth be xthen, $\frac{4}{5}x=16800 $$x= \frac{16800\times5}{4}$$x= \frac{16800\times5}{4}=21000$$\frac{3}{7}\times21000=9000$
