RRB NTPC Mains or Stage 2 Model Paper 9 with solutions

Question : 30 of 120

Marks: +1, -0

A milk man makes a profit of 20% on the sale of milk. If he were to add 10% water to the milk, by what %would his profit increase?

Solution:

(b) Let profit per litre = ₹ 20
So, C.P. / litre = ₹100
S.P. / litre = ₹ 120
On adding 10% water to the milk C.P. per

9/10

litre Rs 100
S.P. per

9/10

litre 120
S.P. per litre

{ 120× 10} /9=₹400

⇒ Profit / litre

400/3- 100= 33.33

% by which profit increases

= 33.33 – 20 = 13.3

Go to Question:

Prev Question

Next Question