A man bought goods for Rs. 800 and sold half at a gain of 5%. Find at what % gain, he must sell the remaining so as to gain 20% on the whole?
Explanation:
SP of 1st half = 400 × 105/100 = Rs. 420
SP of whole = 800 × 120/100 = Rs. 960
Therefore, Second half he should sell at = (540 – 400) × 100/400 = 140 × 100/400 = 35% profit.
Hence, option (d).
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