29 km is about 18.019 miles.
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Speed is a scalar, velocity is a vector and so the direction of motion is important for velocity. Total distance travelled = 3km + 4 km = 7 km Total time taken = 3/5 hours + 4/3 hours = (9+20)/15 = 29/15 hours Average speed = 7 / (29/15) = 7*15/29 = 3.6207 km per hour. Final location = 3 km E + 4 km N = 5 km away from the starting point (by Pythagoras) in the direction 53.13 degrees = arctan(4/3). So average velocity = 5 / (29/15) = 5*15/29 = 2.5862 km per hour in the direction given above.
29 km per hour.
The first thing to do when answering this question is to make sure that the units are consistent. There are 1000m in a km, so to convert km to m you need to multiply by 1000. In this case, 0.0029km x 1000 = 2.9m. So the question is asking "is 29m greater than 2.9m?" It is clear that the answer is yes.
314 miles = 505,334 km 70 mp/h = 112,654 km/h 505334 m/ (112,654 /3.6) = 16148,90 seconds = 269,14 minutes = 4 hours, 29 minutes and 8,4 seconds
2.56 km + 8420 m = 22.56 km + 8.42 km = 30.98 km