There are two ways you can find the answer to this question and both ways will give you the correct answer.
Method One:
If 240 bolts are produce in 25 minutes
then the number of bolts produced per minute = 240bolts ÷ 25min
= 9.6 bolts/ min
∴ bolts produced in 45 minutes = 9.6 bolts/min × 45min
= 432 bolts
Method TWO
240 bolts is produced in 25 mins 240 bolts → 25 mins
x bolts are produced in 45 mins x → 45 mins
25x = (240)(45)
x = 10800 ÷ 25
= 432