Question

Which is the longer trip from Earth, a one-way trip to Mars or a round-trip to Venus?

Answer 1

if a trip from earth to mars, is 97/186=.52150
 
and a trip from earth to venus is 0.2774(now we have to times it by 2 since its a roundtrip),

we get .5548 we can clearly see that .5548>.52150

So roundtrip venus

Answer 2

round trip to Venus