need quick
2007-01-14 05:29:34 · 21 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
speed= distance/ time
speed in km/hr = 9km/0.5hr
= 18 km/hr
2007-01-14 05:35:26 · answer #1 · answered by suzie lou 2 · 0⤊ 0⤋
You start with 9 Km in 1/2 hr.
Since speed = distance / time,
then 9Km /.5 hr = 9 x 2 = 18 Km/hr
2007-01-14 13:36:18 · answer #2 · answered by Vincent A 4 · 0⤊ 0⤋
18
2007-01-14 19:04:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
well half an hour = 9 but u need a full hour. so you double half an hour (2 halfs = 1 whole) and then u double 9 km. 9*2 = 18. so the man could bike 18 km in 1 hour.
2007-01-14 13:34:46 · answer #4 · answered by prtty_patricia 2 · 1⤊ 0⤋
Obviously 18 Km/per hour.
2007-01-14 13:48:35 · answer #5 · answered by Look on the bright side. 5 · 0⤊ 0⤋
If he travels 9 km in 1/2 hour, he will travel 18 km in 1 hour.
If he travels 18 km in 1 hour, it follows that his speed will be 18 km/h
2007-01-14 13:37:04 · answer #6 · answered by Como 7 · 0⤊ 0⤋
9 Km per 1/2 hour = 9Km/h
therefore
18 per 1 hour
or 18Km/h
I believe
2007-01-14 13:56:38 · answer #7 · answered by Anonymous · 0⤊ 0⤋
1/2 hour = 9km
1 hour = 18km
Hence 18 km/h
2007-01-15 23:59:06 · answer #8 · answered by Kemmy 6 · 0⤊ 0⤋
18 km per hour
2007-01-15 13:29:04 · answer #9 · answered by azman5998 3 · 0⤊ 0⤋
He's going to slow 18 km an hour he could go 40
2007-01-14 13:36:11 · answer #10 · answered by STA-TOW 5 · 0⤊ 1⤋