Ian thorpe from autralia qualified to get into the 400m freestyle swim race. his time to qualify was 3 mins 45 secs. wat was his average speed swimming this race to the nearest metre per minute?
thanks
2007-05-02 08:00:52 · 2 answers · asked by **Lilyanne** 3 in Education & Reference ➔ Homework Help
He travelled 400 meters in 3mins and 45 seconsd.
3 .ins and 45 seconds = 3 + 45/60 mins
= 3.75
His speed = 400/3.75 meters per minute
= 106.66666
= 107 meters per minute
2007-05-02 08:11:04 · answer #1 · answered by Sudewa 2 · 0⤊ 0⤋
Average speed = 400m / (3 3/4) min
(45 sec = 3/4 min)
Average speed = 400 / (15/4)
(invert the fraction and multiply)
Average speed = 400 (4/15)
Average speed = 106.67 or rounded 107 m/min
.
2007-05-02 15:10:44 · answer #2 · answered by Robert L 7 · 0⤊ 0⤋