Question
The present ages of Priya’s father and mother are in
the ratio R:S. If the father’s age increases by 4 years and the mother’s age decreases by 4 years, the ratio becomes 13/7. If the sum of their actual ages is 80 years, find the father’s current age.Solution
ATQ, Father’s age = x Mother’s age = y x + y = 80 — (1) (x + 4) / (y − 4) = 13 / 7 7(x + 4) = 13(y − 4) 7x + 28 = 13y − 52 7x − 13y = −80 — (2) Multiply (1) by 13: 13x + 13y = 1040 Add with (2): (13x + 13y) + (7x − 13y) = 1040 − 80 20x = 960 x = 960 / 20 = 48 Required answer = 48 years
Who among the following sits on the extreme ends of the row?
Who is second to the left of D?
Five friends, N, O, P, Q and R, are sitting in a straight line. N and O are adjacent to each other. O is between N and P. N is third to the left of Q. Q...
Who is to the immediate right of J?
What is the position of B with respect to the one who is sitting 2ndto the right of M?
Who is the spouse of A?
The number of persons seated to the left of B was twice that of the number of persons seated to the right of _______
How many persons sit in the row?
What is the code of ‘always impossible’?
Seven persons P, Q, R, S, T, U and V sit around a circular table not necessarily in the same order. All of them face inside. V sits third to the left of...
Relevant for Exams:
