Question

please answer my question a girl runs a distance of 100 meters in 20 seconds. calculate the speed of the running girl a per hour b per minute c per second

Answer 1

the speed of the running girls are 5m per minute

Answer 2

here the given data
a girl runs 
distance = 100 m
time taken = 20 seconds.

case one = speed of girl running per hour
      
one hour = 3600 seconds.
      distance                   time
      100m                         20s
         ?                            3600s
by cross multiplying we have
distance covered by the girl in one hour = 100 * 3600/20
                                                                = 18,000m
speed of the girl = distance / time
                           =  18000/3600
                            =50 m/s

case two 
per minute.
one minute = 60 seconds
 distance covered by the girl in one minute = 60 * 100/20
                                                                     =300 m
speed of the girl = distance / time
                           = 300/60
                            = 5 m/s

case three
per second
distance travelled by the girl per second = 1 * 100/20
                                                                 = 5m
speed of the girl = distance covered / time taken
                           = 5/1
                            = 5m/s

HOPE IT HELPS U PLS MARK AS BRAINLIEST