Question

Mike walks 200 km in 6 hours.he then walks another 100km in 4 hours .what is his average speed?

Answer 1

Average speed is defined as the ratio of total distance covered in total given time

`speed = (distance)/(time)`

here we know that total distance that man moved is

`d_1 = 200 km`

`d_2 = 100 km`

so total distance is

`d = d_1 + d_2`

`d = 200 km + 100 km`

`d = 300 km`

now here total time of the motion is

`t_1 = 6 hours`

`t_2 = 4 hours`

total time will be given as

`t = t_1 + t_2`

`t = 6 + 4 = 10 hours`

now by above formula

`v_(avg) = (300)/(10)`

`v_(avg) = 30 km/h`

so his average speed is 30 km/h