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13-10-2020
Mathematics

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if a shopkeeper sold a watch for Rs 640 at a loss of 20%,find the cost price of the watch

Respuesta :

13-10-2020

Answer:

Rs 800

Step-by-step explanation:

Selling Price =Rs640

Loss=20%

Let the cost price of the watch be Rs x.

SP=CP-20%of CP

or, 640=x-x/5

or, 640=4x/5

or, 4x=640*5

or,x=3200/4

Therefore, x=Rs 800. The cost price of the watch is Rs 800.

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