If a car covers \[2/5th\] of the total distance with \[{{v}_{1}}\] speed and \[3/5th\] distance with \[{{v}_{2}}\] then average speed is

• A. \[\frac{1}{2}\sqrt{{{\text{v}}_{1}}{{\text{v}}_{2}}}\]  
• B. \[\frac{{{\text{v}}_{1}}+{{\text{v}}_{2}}}{2}\]
• C. \[\frac{2{{\text{v}}_{1}}{{\text{v}}_{2}}}{{{\text{v}}_{1}}+{{\text{v}}_{2}}}\]       
• D. \[\frac{\text{5}{{\text{v}}_{1}}{{\text{v}}_{2}}}{\text{3}{{\text{v}}_{1}}+2{{\text{v}}_{2}}}\]