please answer this question.
sahithi197
Asked:
December 2022
prove that the points A(0,0),B(1,3),c(4,2)and d(3,-1) are the vertices of a square.also,find the area.
A train travels the first 25km at a uniform speed of 30km/h ; the next 75km at a uniform speed of 50km/h; and the last 10km at a uniform speed of 20km/h .calculate the average speed for the entire train journey.