Plz solve it for me!!!!!!

Dear Student

T = 2π √ l/g

T₁ = 2π √ 9/g = 2π x 3 / √ g
T₂ = 2π √ 25/g = 2π x 5 /√ g

T_{1 =} 2π x 3 / √ g
T₂    2π x 5 /√ g

T₁: T₂ = 3:5

Regards