A staircase is to be constructed between M and N (Figure 1). The distance from M to L is 5 meters and the distance from L to N is 2 meters. If the height of a step is 25 centimeters and its width can be any integer multiple of 50 centimeters, how many different ways can we arrange the number and width of the steps? Solution number of unit in x axis = 10 number of unit in y axis = 8 so 1x7+1x3 8way 1x6+2x2 45 way total 53 way.