Saved Bookmarks
| 1. |
The ratio of the present ages of a son and his father is `1:5` and that of his mother and father is `4:5` After 2 years the ratio of the age of the son to that of his mother becomes `3:10`. What is the present age of the father ?A. 30 yearsB. 28 yearsC. 37 yearsD. None of these |
|
Answer» Correct Answer - D `(S)/(F)=(1)/(5)rArr F=5S` `(M)/(F)=(4)/(5)rArr M=(4)/(5)F` `(S+2)/(M+2)=(3)/(10)` ` rArr 10S +20=3M+6=3xx(4)/(5)xx 5S+6=12S+6` `therefore 2S=14rArr S=7` years `therefore F=5S=35` years. |
|