Question

five times the cost price of a notebook is equal to 4 times the selling price of the notebook. if the selling price is rs 5 more than the cost price, than find both the c.p and s. p of the notebook​

Answer 1

Answer:

cost price-20 rs

selling price-25

Step-by-step explanation:

c.p=x &s.p=y

y=x+5  &  5x = 4y

5x  =4(x+5)

5x = 4x+20

x = 20 & y =25

Answer 2

Answer:

Step-by-step explanation:

Step 1 : Since , the 5 time of c.p is equal to 4 times of s.p, c.p and s.p are in ratio 4:5, c.p/s.p = 4/5

Step 2: And given that s.p is 5rs more than c.p,

thus let's take c.p = x and s.p = x+5.

Step 3: lets substitute step 2 values in step 1 , thus

x/x+5 = 4/5 ,

5x=4x+20

x=20, thus c.p = 20rs

s.p = 20+5 = 25rs