Atruck travels at an average speed of 70 km/hr. if it travels 100 km in the first hour,
how far will it go the second hour of a 2 hour trip?

40km

Explanation:

Average speed can be computed with the equation:

So we know the average speed and one of the distances is already given and we need to know how much it traveled after that. The total time the car traveling is 2 hours. Let's plug that in our equation:

Now let's multiply both sides by 2 hours:

Cancel out the hours and multiply:

Subtract 100km from both sides of the equation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.