The speed of a bus increases uniformly from 15 ms-1 to 60 ms-1 in 20 sec. calculate the average speed, the acceleration and the distance travelled during the entire period

where’s the list ? the question is incomplete

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.