Difficulty: Easy
Correct Answer: 8 years
Explanation:
Introduction / Context:This problem mixes a “twice as old as” condition referring to the past with a present-age difference. We form two equations in two unknowns.
Given Data / Assumptions:
Concept / Approach:Direct substitution is simplest: solve the two simultaneous linear equations to obtain integer ages.
Step-by-Step Solution:
From P − R = 2 ⇒ P = R + 2Set R + 2 = 2(R − 2)R + 2 = 2R − 4 ⇒ 6 = R ⇒ R = 6Thus P = R + 2 = 8Verification / Alternative check:
Two years ago: Rita = 4, twice that is 8 ⇒ Pushpa = 8 ✓Why Other Options Are Wrong:
Common Pitfalls:Applying “twice as old” to the present age of Rita rather than her age two years ago; or assuming the older person is not specified by the difference (here, difference confirms who is older).
Final Answer:8 years
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