check the dimensional accuracy of the relation T=2pie root l/g?

The given equation is

T = 2π√(l/g)

here

[l] = [M⁰L¹T⁰]

[g]  = [M⁰L¹T^-2]

and

[t] = [M⁰L⁰T¹]

now,on the right hand side

[ [M⁰L¹T⁰]/[M⁰L¹T^-2] ]^1/2 = [1/T^-2]^1/2

or

=  [M⁰L⁰T¹]

which is equal to the LHS. Thus the equation is dimensionally consistent.