We have, T=Ga⋅hb⋅cc ⇒T=[M−1L3T−2]a[ML2T−1]b[LT−1]c Equating dimensions of similar physical quantities, we have −a+b=0...(i) 3a+2b+c=0...(ii) −2a−b−c=1...(iii) Adding Eqs.(ii)‌and(iii), we have a+b=1...(iv) From adding Eqs.(i) and (iv), we have b=