B) The price of an electric fan is fixed 20% above its cost price. When it is sold allowing 18% discount, there is a loss of Rs 20. Calculate the marked price and the selling price
of the fan.

Step-by-step explanation:

Let Cost price ( C.P ) be x

Finding the Marked price and selling price

Marked price =

⇒

⇒

⇒ ⇒ ( i )

Selling price =

⇒

⇒

⇒

⇒

⇒ ⇒ ( ii )

Finding the value of x ( Cost price )

⇒

⇒

⇒

⇒

⇒

⇒

Value of x ( cost price ) = Rs 1250

Now, Replacing the value of x in ( i ) in order to find the value of marked price

⇒

⇒

Replacing value of x in ( ii ) in order to find the value of selling price

⇒

⇒

Thus , Marked price of the fan = Rs 1500

Selling price of the fan = Rs 1230

Hope I helped!

Best regards!!