The cost of an article reduces by 20%. This lets a person buy 2 kg more for Rs 600. Find the reduced and the original price per kg.

ARs 60 and Rs 80

BRs 60 and Rs 75 ✓ Correct

CRs 75 and Rs 60

DRs 50 and Rs 60

Correct answer: (B) Rs 60 and Rs 75

Explanation

The reduced price is Rs 60 per kg and the original Rs 75 per kg.

Let the original price = P; the reduced price = 0.80P.

The saving buys 2 kg more: 600 / 0.80P - 600 / P = 2.

750 / P - 600 / P = 2, so 150 / P = 2 and P = 75.

Reduced price = 0.80 x 75 = 60.

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