I train three hundred meters long is running at a speed of 90 km per hour. how many seconds will it take to cross a 200 M Long Train Running in the same direction at a speed of 60 kilometers per hour?​

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample