Answer:
24 minutes.
Step-by-step explanation:
Let D represent the distance from school to home and T represent time.
We have been given that your brother takes 40 minutes to get to school.
You take 30 minutes to get to school.
Your brother left 4 minutes before you did, so distance traveled by him would be:
You speed:
You will catch your brother, when both distances would be same:
Cross multiply:
Use distributive property:
Switch sides:
Therefore, it will take you 24 minutes to catch up your brother.