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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_