Question
Oscar runs 80 metres for 5 times. The average time taken for his first three runs is 16.6 seconds. He aims to have an average timing of 14.5 seconds for his five runs.
  1. What is the average time he needs to take for his 4th and 5th run in order to achieve his aim?
  2. If he runs 5 seconds faster in one of the five runs, what would be his average time for the five runs?
5 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Oscar runs 80 metres for 5 times. The average time taken for his first three runs is 16.6 seconds. He aims to have an average timing of 14.5 seconds for his five runs.
  1. What is the average time he needs to take for his 4th and 5th run in order to achieve his aim?
  2. If he runs 5 seconds faster in one of the five runs, what would be his average time for the five runs?