A dealer sells a grain whose C.P is Rs. 50/kg at Rs 60/kg. First day by replacing it by a substitute of Rs. 40/kg and second day selling the pure grain. What is the ratio of profit % of the two days?

A 1 : 2

B 3 : 1

C 3 : 2

D 5 : 2

E None of these

Correct Answer: Option D

C.P = Rs 40/kg

S.P = Rs. 60/kg

Profit % = \(\frac{{S.P - CP}}{{CP}} \times 100\)

\(= \frac{{20}}{{40}} \times 100 = 50\)%

Day 2 C.P = Rs. 50/kg

S.P = Rs. 60/kg

Profit % = \(\frac{{S.P - C.P}}{{C.P}} = \frac{{10}}{{50}} \times 100 = 20\)%

⇒ Ratio of profit for day 1 and 2 = 50 : 20 = 5 : 2