Question

In enclosure there was both cows and crows.If there are 30 heads and 100 legs.What is the fraction of crows

Answer 1

(one cow has one head & 4 legs then 20 cows head ,20 & legs 80)20 cows, 10 Crows(one Crow has 1 head,and 2 legs so 10 heads and 20 legs

Answer 2

Answer:

1:3

Step-by-step explanation:

let crow number be x and cow number be y

x+y= 30                 (i)

x= 30-y

2x+4y  =100

put value of x in above equation

2(30-y) +4y =100

60-2y +4y =100

2y =40

y=20

x=30-20=10

total  animals = x+ y = 20+10 = 30

fraction of crows = 10/30 = 1:3