Jack and Jill cycled along the same route 40km routeJack took 2 1/2 hours to cycle the 40kmJill started to cycle 10 minutes after jack stared to cycle. Jill caught up with jack when they had both cycled 24kmJack and Jill both cycled at constant speedWork out Jill’s speed

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

40 x 50 = 2000

step-by-step explanation: