Answer:
1) 33km
2a) 18km/hr
b) Speed of cyclist B not constant
See below for explanation
Step-by-step explanation:
The question is incomplete as what is to be determined from the table wasn't specified.
From the question and table, we can tell two cyclists moving at the same direction covered different distances at same time interval.
1) Let's determine their distance apart after 120min and 2) speed of each cyclist
Solution:
1) Distance covered by cyclist 1:
3km + 9km + 18km + 36km = 66km
Distance covered by cyclist 2:
0.78km + 3.42m + 10.08m + 32.12km
Since the units are not the same, Let's convert the unit (from meters to km)
1000m = 1km
3.42m= 0.00342km
10.08m = 0.01008km
Distance covered by cyclist 2:
0.78km + 0.00342km + 0.01008km + 32.12km = 32.9135km
Their distance apart after 120min (2hrs):
60min = 1hr
120min = 2hrs
= Distance covered by cyclist 1 - Distance covered by cyclist 2
= 66 - 32.9135 = 33.0865km
Their distance apart after 120min (2hrs) = 33km (nearest km)
2a) Speed = distance/time
Time interval = 10min, 30min, 60min, 120min respectively
In hours: (1/6)hr, (1/2)hr, 1hr, 2hrs respectively
Speed of cyclist 1 (km/hr)= distance/time
For each time interval(km/hr):
=3/(1/6); 9/(1/2); 18/1; 36/2
= 18km/hr; 18km/hr; 18km/hr; 18km/hr
Therefore, the speed of cyclist 1 is constant = 18km/hr
2b) Speed of cyclist 2:
For each time interval(km/hr):
= 0.78/(1/6); 0.00342/(1/2); (0.01008/1); (32.12/2)
= 4.68km/hr; 0.00684km/hr; 0.0108km/hr; 16.56km/hr
The speed of cyclist 2 is not constant.