Register
Swim 2km at 3km/h. Run at 12km/h for 1 ½ hours. Cycling 55km at 30 km/h. What is the mean overall speed.
18.1k views
1 vote
Swim 2km at 3km/h. Run at 12km/h for 1 ½ hours. Cycling 55km at 30 km/h. What is the mean overall speed.

User Pinkpanther
by
4.3k points

1 Answer

4 votes

Answer:

t1 = S1 / V1 = 2 km / 3 km/hr = 2/3 hr where S1 = 2 km

S2 = 12 km/hr * 3/2 hr = 18 km where t2 = 3/2 hr

t3 = S3 / V3 = 55 km / 30 km/hr = 11/6 hr where S3 = 55 km

T = t1 + t2 + t3 = 4/6 + 9/6 + 11 / 6 = 24/6 = 4 hrs

S = S1 + S2 + S3 = 2 + 18 + 55 = 75 km

V = S / T = 75 km / 4 hrs = 18.75 km/hr for the average speed

User Patrick Spettel
by
5.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.2m questions

6.7m answers

Other Questions

A space shuttle is approaching the surface of the moon to land. It approaches the moons surface with an initial velocity of 28m/s and is slowing at a rate of -2m/s^2. Show all work and units for problems.
________ is a measure of the internal energy that has been absorbed or transferred from one body to another, often due to a difference in temperature.
5. What happens to the arrangement of water molecules as ice melts? A Molecules gain enough energy to escape as vapor. B Molecules release enough energy to escape as vapor. C Molecules gain enough energy
A projectline is shot from the edge of a cliff 100 m above the ground with intial speed 10 m/s at an angle 30 with the horizontal. 1) determine the time taken by the projectile motion to hit the ground
You’re on a team performing a high-magnetic-field experiment. A conducting bar carrying 4.1 kA will pass through a 1.3-m-long region containing a 12-T magnetic field, making a 60° angle with the field.
Link Copied!