PSLE
Emily and Mia 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. Emily jogged past Mia after 10 km. Both of them did not change their speeds throughout. Emily took 30 min to complete one round. What was Mia's jogging speed in m/min?
Distance that Mia jogged when they passed each other
= 15 - 10
= 5 km

Time that Emily took to jog 15 km = 30 min

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

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

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

1 km = 1000 m
5 km = 5000 m

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

Answer(s): 250 m/min