If 5 books and 4 pens cost Rs.230 and 4 books and 5 pens cost Rs.220, then cost of 1 book is:
ARs. 30
BRs. 25
CRs. 35
DRs. 20
Answer & Solution
Correct answer: A. Rs. 30
1. Let book = b, pen = p. 5b + 4p = 230; 4b + 5p = 220.
2. Add: 9b + 9p = 450 → b + p = 50. Subtract: b − p = 10.
3. So b = 30, p = 20.
_Source: KMAT Karnataka 2022 PYQ Q.119_
Related questions
The equation of the line which contains every point of the form (x, 2x + 3) is:The equation of a line joining (0, 0) and (1, 1) is:The slopes of two perpendicular lines satisfy which relation?The equation of the straight line joining the points (2, 4) and (5, 6) is:If x + y = 10 and x − y = 4, x =If 3x + 2y = 12 and y = 0, x =Slope of y = 4x − 7 is:Solve: 3(x − 2) = 12.