We have,
Rahul starting time =6:40am
Rahul ending time =7:20am.
So,
Reach school
=Endingtime−startingtime
=7:20−6:40
=40minute
Hence, this is s the answer.
Question 90
Ravi starts for his school at 8:20 am on his bicycle. If he travels at a speed of 10 km/h then he reaches his school late by 8 minutes but on travelling at 16 km/h, he reaches the school 10 minutes early. At what time does the school start?