PSLE
Candy and Emily started jogging from the same point of the 15 km track round a nature reserve. They started at the same time but in opposite directions. Candy jogged past Emily after 10 km. Both of them did not change their speeds throughout. Candy took 30 min to complete one round. What was Emily's jogging speed in m/min?
Distance that Emily jogged when they passed each other
= 15 - 10
= 5 km

Time that Candy took to jog 15 km = 30 min

Time that Candy took to jog 1 km
= 30 ÷ 15
= 2 min

Time that Candy took to jog 10 km
= 10 x 2
= 20 min

When Candy took 20 min to jog 10 km, Emily took the same time to jog 5 km.

1 km = 1000 m
5 km = 5000 m

Emily's jogging speed
= 5000 ÷ 20
= 250 m/min

Answer(s): 250 m/min