(b) Heera sold a pen at the loss of 15%. Had she sold it in Rs. 3 more, she should have 5% profit. What would be the cost price of the pen? Find it.

Cost price of the bat is 400 Rs.

Step-by-step explanation:

let the cost price of the bat is x Rs.

he had sold it at 15 % of loss or 85% of cost price

So, 85x/100 + 136 = 119x/100

13600=119x-85x

34x= 13600

x= 13600/34

x=400

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

a is the right answer