Question

calculate the average speed of bicycle if he cover 5km in 15km/h and next he cover 5km in 10km/h​

Answer 1

Explanation:

Average speed = Total distance travelled/ Total time taken

speed = 10 + 15 = 25

time = 5/15 = 1/3

= 5/ 10 = 1/2

total time = 1/2+1/3 = 5/6

Average speed= 25 ÷5/6 = 30

Answer 2

Answer:

Average speed =

total distance/total time taken

Average speed = ( 5 + 5 )/(5/15 + 5/10)

Average speed = 10 /5(1/15 + 1/10)

Average speed = 2/( 2 + 3)/30

Average speed = 2×30/5

Average speed = 12 km /hr