Question

Rabat sells a toy for Rs650 gaining 1/5 of its CP

Answer 1

Heya user 
here is your answer !!

_________

let the cost price be x .

selling price = Rs 650

gain = 1 / 5 of the cost price 
=  1 / 5 * x 
= x / 5

 so , acc, to the question ,
x + x/ 5 = 650
=>6x / 5 = 650
=> x = 650 * 5 / 6
 => x = 542 ( answer )

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Hope it helps !!