Multiple choice

Cost of two watches were in a ratio of 16 : 23. The cost of first watch increases by 10% and that of second by Rs. 477.Now the cost of two watches are in a ratio of 11 : 20. The price of the second watch (in Rs.) in the beginning was-

  1. 932

  2. 1696

  3. 848

  4. 1219

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let original costs be 16x and 23x. After changes: 17.6x/(23x+477) = 11/20. Solving gives x = 53.09, so second watch initially = 23×53.09 ≈ 1219. The ratio equations and percentage increase lead to option D.