MATHS [non]Homework

to be done at school...you may think about it at home, discuss it, work out what you need to find out to be able to answer it at school, with a partner....
in other words - it's not homework.
well, not really.

At the school swimming sports Roo, Sebtastic, Courtorama and Brainyda completed in the fifty metres freestyle heat.

Roo came first with a time of 40.395 seconds.

Brainyda came second, Courtorama came third and Sebtastic pulled a hammy and came fourth.

In the next heat, Mojo finished with a time 27 hundredths of a second slower than Roo.

What was his time? ____________

And why was Mr Woody not there...?