Respuesta :

15

Step-by-step explanation:

[tex]60 = 2 {}^{2} \times 3 \times 5[/tex]

[tex]perfect \: square \: = 2 {}^{2} \times 3 {}^{2} \times 5 {}^{2} [/tex]

Smallest number = 3 x 5 = 15