Enter
the graph at the bottom at 2400 nm, then go straight
up to the ref line.
Then
come back down to -25kts.
This
puts you on the 2300nm line.
Then
go up the graph and read off at 65,000ish - 14000kg.
Then go up to the trip time diagonal.
This
reads off directly at 5.5 but don't forget to account for ISA dev.
Go
back up a little to get the answer.
Oh,
and don’t forget to convert to hours and minutes!!