Question

uat
9.
In a class of 60 students, each boy contributed rupees equal to the number of girls and
each girl contributed rupees equal to the number of boys. If the total money then collected
was 1600. How many boys are there in the class?
CA1​

Answer 1

Answer:

20 or 40

Step-by-step explanation:

Let boys be x, then girls be 60−x

⇒  Contribution by boys =x(60−x)

⇒  Contribution by girls =(60−x)x

⇒  Total money collected =Rs.1600

∴  60x−x2+60x−x2=1600

⇒  −2x2+120x−1600=0

⇒  −2(x2−60x+800)=0

⇒  x2−60x+800=0

⇒  x2−40x−20x+800=0

⇒  x(x−40)−20(x−40)=0

⇒  (x−40)(x−20)=0

∴   x=40 and x=20

∴  Number of boys in class are 20 or 40

Answered By

appy91

Answer 2

Answer:

it's too hard乁( •_• )ㄏಠ︵ಠ

Step-by-step explanation:

☞please like this answer, follow me and make me brainliest☜