a particle was at rest from 9:00 am to 9:30 am it moved ata uniform speed at 10km/ hr from 9:39 am to 10:00am find avrage speed between a 9: am to 10: am
Answers
Answer:
Given conditions ⇒
Speed of the Particles = 10 km/hr.
As per as the Question, we need to find the Average speed of the Particles between 9 am to 10 am.
∴ Total time = 1 hrs.
Speed of the Particles between 9 to 9:30 am = 0
∴ Distance covered by the Particles in 30 minutes = 10 × 0.5
= 5 km.
Average speed = Total Distance/Total time.
∴ = 5 × 1
= 5 km/hr.
Hence, the average speed of the Particles is 5 km/hr.
___________________________
(b). Distance covered in 30 minutes = 5 km.
Total time taken by it = 45 minutes.
= 45/60 hrs.
= 3/4 hrs.
∴ Average Speed = 5/(3/4)
= 20/3
= 6.67 km/hr.
Hence, the average speed of the Particles is 6.67 km/hr.
Hope it helps. :-)
Explanation:
Given
speed of particle -10km/hr
9:30 to 10:00
distance= speed ❌ time
= 10 ✖️ 0.5
= 5km/hr
Explanation:
distance covered in 30 min = 5km
Total time taken = 45min ( bcz it started from 9: 15)
change 45 min into hour ( 45/60)= 3/4 hrs
avg speed = total distance/total time
= 5÷ 3/4
= 5 ❌ 4/3
= 20/3
= 6.67km/hr ans
hope it's help you mark me as brainliest plz