Profit and Loss Practice Test 9

Question : 28 of 40

Marks: +1, -0

A watch was sold at a profit of 15%. If its cost had been 5% less and it had been sold for Rs 21 less, then the profit would have been 10%. Find the cost price of the watch.

Rs 200
Rs 400
Rs 190
None of these

Validate

Solution:

\table CP,SP;x,115/100x;95/100x,115/100x-21

Cost price of the watch

={{115x-21}/100-{95x}/100}/{{95x}/100}×100=10

{115x-2100-95x}/100×100/{95x}×100=10

(20x-2100)/{95x}100=10

20x-2100=9.5x

10.5 x = 2,100

Cost price of the watch = x = 200

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