Question

Amber bought eggs at Rs. 8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15% ?​​

Answer 1

Answer:

(i) CP =  Rs.. 1200, SP = Rs.. 1350  

    CP < SP.  So, profit.

    Profit = Rs. (1350 - 1200) = Rs. 150

(ii) CP = Rs. 980, SP = Rs. 940  

    CP > SP.  So, loss.

    Loss  =   Rs. (980 - 940) = Rs. 40

(iii)  CP = Rs. 720, SP = ?, profit = Rs. 55.50

      Profit = SP - CP

⇒   Rs. 55.50 = SP - Rs. 720

⇒   SP = Rs. (55.50 + 720) = Rs. 775.50

(iv) CP = ?, SP = Rs. 1254, loss = Rs. 32

⇒ Loss = CP - SP

⇒ Rs. 32 = CP - Rs. 1254

⇒ CP = Rs. (1254 + 32) = Rs. 1286

Step-by-step explanation:

(i) CP =  Rs.. 1200, SP = Rs.. 1350  

    CP < SP.  So, profit.

    Profit = Rs. (1350 - 1200) = Rs. 150

(ii) CP = Rs. 980, SP = Rs. 940  

    CP > SP.  So, loss.

    Loss  =   Rs. (980 - 940) = Rs. 40

(iii)  CP = Rs. 720, SP = ?, profit = Rs. 55.50

      Profit = SP - CP

⇒   Rs. 55.50 = SP - Rs. 720

⇒   SP = Rs. (55.50 + 720) = Rs. 775.50

(iv) CP = ?, SP = Rs. 1254, loss = Rs. 32

⇒ Loss = CP - SP

⇒ Rs. 32 = CP - Rs. 1254

⇒ CP = Rs. (1254 + 32) = Rs. 1286