If a car covers 2/5th of the total distance with v_(1) speed and 3//5^(th) distance with v_(2) then average speed is

If a car covers 2/5th of the total distance with v_(1) speed and 3//5^

1.	If a car covers 2/5th of the total distance with v_(1) speed and 3//5^(th) distance with v_(2) then average speed is
Answer» `(1)/(2)SQRT(v_(1)v_(2))` `(v_(1)+v_(2))/(2)` `(2v_(1)+v_(2))/(v_(1)+v_(2))` `(5v_(1)v_(2))/(3v_(1)+2v_(2))` Answer :D