4 Answers

A negligible amount. Do you realize that 200kg is about what 3 average guys weigh without any check-in or carry on luggage ? How much significant extra drag would the 3 amigos really cause ?

Funny but interesting question.

I don't know the specs but I do know that all airlines are calculating distance/fuel consumption for destination now to conserve energy, thus saving fuel. The down side is it puts passengers in danger if there is a problem, weather, mechanical malfunction. Sometimes they need to stay airborne for one reason or another in emergencies.  However, I trust that they take into consideration weather and possible landing delays by calculating reserve, I haven't heard of one falling out of the sky yet because it ran out of fuel.   

200kg Does not cause drag unless its on the wing of the plane ..There are many factors you left out what series of 747,At what ALT is the plane traveling and the crosswinds play a role as well