Question

Out of given three numbers, the first is five times of the second and is two-third
of the third number. If the average of these three numbers is 36, then find the
square of the second number,​

Answer 1

Answer:

let the first number be x

second number =y

third number =z

x=2/3z=>z=3/2x

x=5y=>y=x/5

x+y+z/3=36

x+y+z=3*36

x+y+z=108

x+x/5+3x/2=108

27x/10=108

27x=10*108

27x=1080

x=1080/27

x=40

square of second number is (40/5)2

=(8)2

=64