Find the average speed, if a cyclist travels,(1) 6 km/h for 25 minutes

1.	Find the average speed, if a cyclist travels,(1) 6 km/h for 25 minutes and 8 km/h for15 minutes.
Answer» Step-by-step EXPLANATION: 25 min = 25/60 h= case1. distance = SPEED x time = 6 x 25/ 60 = 25/10 = 2.5 km case2. 15 min = 15/60 h distance = speed × time = 8 x 15/60 = 2X 15/15 = 2 km Now avg speed = total distance/ total time = 2 + 2.5/ 25/60 +15/60 = 4.5/ 40/60 = 4.5/.6 = 7.5 km/h

Find the average speed, if a cyclist travels,(1) 6 km/h for 25 minutes and 8 km/h for15 minutes.

Answer»

Step-by-step EXPLANATION:

25 min = 25/60 h=

case1.

distance = SPEED x time

= 6 x 25/ 60

= 25/10

= 2.5 km

case2.

15 min = 15/60 h

distance = speed × time

= 8 x 15/60

= 2X 15/15

= 2 km

Now

avg speed = total distance/ total time

= 2 + 2.5/ 25/60 +15/60

= 4.5/ 40/60

= 4.5/.6

= 7.5 km/h