Hallgeir, Peder and Sverre have been training hard for the Beijing 2022 Olympics for the past 4 years.
Their training has paid off and Hallgeir, Peder and Sverre have increased their average speed in the speed skating men’s team pursuit by 10%.
By what percentage did their time decrease?
Answer
Let the distance be d metres
Let the original speed be x m/s
Original time = d/x
New time d/1.1x
New /Old = 1/1.1 x 100 % = 90.9 %
Decreases by (100 – 90.9) % = 9.1 %