Question

A clock was sold for Rs. 144. If the percentage of profit was numerically equal to the cost price, what was the cost of the clock?​

Answer 1

★Question :

➙ A clock was sold for Rs. 144. If the percentage of profit was numerically equal to the cost price, what was the cost of the clock ?

★Given :

➙ selling price of the clock = 144.

➙ profit percentage is numerically equal to the cost price .

★To Find :

➙ Cost price of the clock .

★Considering :

➙ Let 'x' be the cost price of the clock .

★Solution :

➙ x + x × x/100 = 144

➙ 100x + x² = 144

➙ x² - 80x + 180x - 14400 = 0

➙ x ( x - 80 ) + 180 ( x + 80 )

➙ x = 80 [ x can't be negative ]