Question

In a class of 40 students each boy contributed money double to the number of girls and each girl contributed money equal to the number of boys if the total money then collected was rupees 900 then find the number of boys and girls in the class

Answer 1

Answer:

30 and 10

Step-by-step explanation:

girls X

boys 40-X

contribution

girls X(40-X)=

40X-X^2

boys (40-X)×2X=

80X - 2X^2

total amount

120X - 3X^2 =900

3X^2 -120X + 900= 0

X^2 - 40X + 300 =0

## solve this eq. ##