Question

the number of girls in a school is 340 less than the number of boys if the total number ofstudents in school is 796 find the number of girls and boys

Answer 1

Let the adjacent side 11x and 10x
Then,perimeter of rectangle =2(l+b)
2(11x+10x)=84cm
2multiply21x=84cm
42x=84cm
x=2cm
So,adjacent sides=10*2=20 and 11*2=22

Answer 2

Let the no. of boys be x
Then girls =x-340
Total students =796
x+x-340=796
2x=796+340
2x=1136
x=568
Then boys =568
Girls =228