Question

21. Mr.Ramesh bought a number of shirts, each at the same price for a total of Rs.3300.He
sold each shirt at Rs.165. With total return, he could buy 15 more shirts than before. How many shirts did he buy​

Answer 1

Answer:

10

Step-by-step explanation:

Let no. of shirts be N

Let price of 1 shirt be X

Mr.Ramesh bought shirts= NX=3300

He sold each shirt at Rs 165

means at price of 165N........1

Now he could buy 15 more shirts

means of Rs. 15X

Then he got profit of 3300 + 15X..........2

using 1 & 2

165N = 3300 + 15X

165N - 15X = 3300

15(11N - X) = 3300

11N - X = 3300/15

11N - X = 220

X = 11N - 220........3

Now we know NX = 3300

N(11N - 220) = 3300

11N^2 -220N -3300 =0

N^2 -20N - 300 = 0

N^2 + 30N -10N -300 = 0

N(N+30) -10(N+30) = 0

(N-10) (N+30) = 0

N=10. or. N= -30

Therefore N=10 is correct

No. of shirts he bought is 10