Answer:
Javier rode bike 34 minutes before lunch.
Step-by-step explanation:
Let the number of minutes Javier rode the bike after lunch be = x minutes
Then according to question number of minutes he rode the bike after lunch

Total number of minutes he rode bike = 41 min
Therefore,

On solving

Divide both side by 6 we get

Number of minutes he ride before lunch
min
The pack of pencils weighs 21.6 grams because 0.9 times 24 is 21.6