"By car" is correct. And you found it "in" a book.

Academic
Dear members of this forum,
I have a doubt about an expression found on an English school book in Germany... Is it correct to say "Dartmoor is 30 minutes from Plymouth in the car."? Shouldn't it be "Dartmoor is 30 minutes from Plymouth by car."?
I found this sentence written on the pupils' book. It is part of an exercise to choose true or false after listening to a dialogue. Curiously, to the girl's question "How far is it from Plymouth?", the boy in this dialogue answers "Not very far. It takes about 30 minutes by car." Nowhere in the dialogue nor in the exercise is a reference to a specific car...
Thank you very much in advance!
"By car" is correct. And you found it "in" a book.
Bear in mind, though, that in BrE, you will hear "in the car" instead of "by car" in some contexts.
Helen: Hi, Steve! Hi, Paul! You're here earlier than I expected. How did you get here?
Steve: Oh, we came in the car in the end. We couldn't be bothered with faffing around with trains!
John: Mum, how long will it take us to get to Auntie Sue's?
Mum: About fifteen minutes in the car or forty-five minutes on the bus.
John: What if we walk?
Mum: Don't even think about it! It would take about two hours. My knees aren't up to it!
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Thanks a lot for your answer, emsr2d2! It does make sense...
I just wonder why the book has a sentence written with "in the car", while the boy in the dialogue says "by car"... that's a bit confusing for pupils, I guess - especially whent it is a "true/false" exercise! Actually the whole sentence is true (Dartmoor is 30 min from Plymouth), but children may think it is false due to this change.
Have a nice day!
Thank you, Dave!
Sorry, I do know it is "in" the book, I guess it was a typo, because the "o" is right next to the "i"... Shame on me, from now on I'll have to read my posts twice before I send them!
Have a nice day!
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.