Two straight lines `l_(1)` and `l_(2)` cross each other ar point P The line `l_(1)` is moving at a speed `v_(1)` perpendicular to itself & line `l_(2)` is moving at a speed `v_(2)` in the similar fashion. The speed of point P is : A. `sqrt((v_(1)v_(2))/(sinalpha))`B. `sqrt(v_(1)^(2)+v_(2)^(2)+2(v_(1)+v_(2))^(2)cosalpha)/(cosalpha)`C. `sqrt(v_(1)^(2)+v_(2)^(2)+2(v_(1)+v_(2))^(2)cosalpha)/(sinalpha)`D. `((v_(1)+v_(2))+sqrt(v_(1)v_(2))cosalpha)/(cosalpha)`

Two straight lines `l_(1)` and `l_(2)` cross each other ar point P The

1.	Two straight lines `l_(1)` and `l_(2)` cross each other ar point P The line `l_(1)` is moving at a speed `v_(1)` perpendicular to itself & line `l_(2)` is moving at a speed `v_(2)` in the similar fashion. The speed of point P is : A. `sqrt((v_(1)v_(2))/(sinalpha))`B. `sqrt(v_(1)^(2)+v_(2)^(2)+2(v_(1)+v_(2))^(2)cosalpha)/(cosalpha)`C. `sqrt(v_(1)^(2)+v_(2)^(2)+2(v_(1)+v_(2))^(2)cosalpha)/(sinalpha)`D. `((v_(1)+v_(2))+sqrt(v_(1)v_(2))cosalpha)/(cosalpha)`
Answer» Correct Answer - C

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