1. A driver leaves a city at 6 a.m. and another driver leaves the city from the same place at 11:30 a.m. in the same direction. If the average speed of the first driver was 55 km/h and the second driver was 62 km/h, find the time at which they will be together.
Answers
Explanation:
Mirrors, whose reflecting surfaces are curved and can be imagined as part of a sphere, are called spherical mirrors. If the reflecting surface of a spherical mirror is curved outwards, it is called a convex mirror. Whereas a mirror with a reflecting surface, which is bent inwards, is called a concave mirror. Concave mirrors reflect and focus incoming light rays (parallel) at a point, called the focus point. Depending on the distance of an object from the reflecting surface, different types of images are formed. Both kinds of mirrors are used in science and technology. These are used in daily life also. Concave mirrors are used as headlights, torches, head mirrors, solar furnaces, microscopes, telescopes, etc.
As the second driver leaves at 11:30 a.m., that means he leaves (11:30am - 6am)= 5.5 hours after the first driver. So, the time duration for second driver is (t- 5.5) hours. The average speed of the first driver was 55 km/hour and the second driver 65 km/hour. As Distance= Speed × Time , so the equation will be ....