Question

speed of the boat in still water is 8 km/hr and the speed of the stream is 2.5 km/hr . find the time taken by the boat to row a distance of 4 km downstream and come back to the starting point​

Answer 1

Change of origin and change of scale: Following are the effects of change of origin and change of scale on the mean, standard deviation and variance. ... Any constant multiplied or divided (Change of scale) then mean, standard deviation and variation will change of the new changed data.