The formula to find young's modulus is >>>>

Y = F*L /(dL*A)

where ,

Y=Young's modulus in units of pressure (F/A)

F=force

A=cross-section area

L=length

dL=change in length

Y = F*L /(dL*A)

where ,

Y=Young's modulus in units of pressure (F/A)

F=force

A=cross-section area

L=length

dL=change in length