On observation 34=2+32 or 32+2 When √x^3/√(20-x)=2.x^3=4(20-x) on squaring x^3+4x=80=64+4×4 x=4 √16^3/√4=4^3/2=32 When √x^3/√(20-x)=32,x^3=32×32(20-x) on squaring x^3=1024(20-x)=20480-1024x x(x^2+1024)=16×1280=16(256+1024) X=16 √16^3/(20-16)=4^3/√464/2=32 √(20-16)^3/√16=2^3/4=8/4=2.