1. Cindy walked to the cinema 2 km away from her house. She reached the cinema after half an hour. What was her average speed?
2. An eagle flew a distance of 360 km in 5 hours. What was its average speed in km / hour?
Answer this question with your solutions! If there's no solutions, u can't get 10 points (if your answer's correct!)!!!
2006-11-28 21:32:59 · 9 answers · asked by ? 3 in Science & Mathematics ➔ Mathematics
average speed =total distance/total time
1.
total distance=2km
total time=1/2hr
average speed =4km/hr
2.
total distance=360km
total time=5hr
average speed =360/5=72km/hr
thanks & good luck
2006-11-28 21:43:20 · answer #1 · answered by sidharth 2 · 0⤊ 0⤋
2 km in half an hour = 2*2 = 4 km in an hour; speed 4km/hour
you didvide the number of km by 5 so 360/5 = 72 km/hour
2006-11-28 21:47:09 · answer #2 · answered by maussy 7 · 0⤊ 0⤋
1. Cindy walked 2 km in 1/2 an hour.
Multiply both numbers by 2.
Therefore, she could walk 4 km in 1 hour.
Her average speed is therefore 4 km/hr.
2. Eagle flew 360 km in 5 hours.
Divide both numbers by 5.
Therefore, eagle could fly 72 km in 1 hour.
Its average speed is therefore, 72 km/hr.
2006-11-28 21:50:58 · answer #3 · answered by falzoon 7 · 0⤊ 0⤋
Remember;
speed=distance\time
1.d=2kms
t=1\2 hour
s=2 divided by 1\2
2*2
=4km\hr
2. d=360kms
t=5kms
s=360\5
=72km\hr
it's easy isn't it!!!
2006-11-28 23:34:54 · answer #4 · answered by Lyf's HeCtIC!!!!!!!! 2 · 0⤊ 0⤋
Average Speed = Total D divide by Total T
1: 2x2 = 4km/h
2: 360/5 = 72km/h
2006-11-28 21:47:01 · answer #5 · answered by AndyPandy 3 · 0⤊ 0⤋
1.)2km in 1/2 hr gives average speed of 2/(1/2) = 4km/hr
2.)360km in 5 hrs gives average speed of 360/5 = 72km/hr
Do you seriously think this is a problem worth asking?
2006-11-28 21:48:37 · answer #6 · answered by Paleologus 3 · 0⤊ 0⤋
Well, to remind you,
Avg Speed = Total Distance traveled / Total Time taken
This formula will be sufficient for both questions.
Extra Info
But I would like to add that this is not always applicable. When the velocity is not constant you have to use kinematics's equations.
2006-11-28 22:01:23 · answer #7 · answered by nayanmange 4 · 0⤊ 0⤋
Yeah, it is complicated, yet velocity = entire distance / entire time you will desire to locate entire distance and entire time using the information you have. the 1st one 35 km/h for 2 hours factors a distance of 35 x 2 or 70 km She drives yet another 25 km so the completed distance is ninety 5 km entire time. the 1st leg of the journey took 2 hours. you will desire to calculate the time for the 2d leg If S = d / t then t = d / s so 25 km / 40 two km/hr = 0.595 h So entire time is two + 0.595 hr or 2.595 h So ave velocity now's entire dist / entire time velocity = ninety 5 km / 2.595 hr = 36.6 km/h ok?
2016-10-13 08:16:24 · answer #8 · answered by Anonymous · 0⤊ 0⤋
i dont know. these questions are too hard.
2006-11-28 22:01:03 · answer #9 · answered by amateur_astrologer 2 · 0⤊ 0⤋