Question
Risa and Oliver were planning to run on a circular track with a circumference of 400 m. Both of them started jogging together at the same start point and moved round the track in a clockwise direction at uniform speeds. Risa completed a full round in 80 s. Oliver completed a full round in 40 s.
  1. How long would it take for Oliver to overtake Risa for the first time?
  2. How far was Oliver ahead of Risa after 10 s?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Risa and Oliver were planning to run on a circular track with a circumference of 400 m. Both of them started jogging together at the same start point and moved round the track in a clockwise direction at uniform speeds. Risa completed a full round in 80 s. Oliver completed a full round in 40 s.
  1. How long would it take for Oliver to overtake Risa for the first time?
  2. How far was Oliver ahead of Risa after 10 s?