certain distance is covered in 10 hours at the speed of 40km/hour what should be the speed if the same distance to be covered in 480 minutes

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?

The table shows the distances travelled by a paper aeroplane. a. find the range and interquartile range of the data. the range is feet. the interquartile range is __feet. b. interpret the range and interquartile range of the data. __ feet the distances travelled by the paper aeroplane varied by no more than__ feet. the middle half of the distances travelled by the paper aeroplane varied by no more than __ feet.

An angle bisector ac divides a trapezoid abcd into two similar triangles ? abc and ? acd. find the perimeter of this trapezoid if the leg ab=9 cm and the leg cd=12 cm.