Question

Four persons step off together during a morning walk. Their steps measure 60 cm, 80 cm, 75 cm and 90 cm respectively. At what distance from the starting point will they again step off together ?

Answer 1

• At first find out the LCM of 60 , 80 , 75 and 90.

               60 = 2 x 2 x 3 x 5

               80 = 2 x 2 x 2 x 2 x 5

               75 = 3 x 5 x 5

              90 = 2 x 3 x 3 x 5

So LCM =  2 x 2 x 2 x 2 x 3 x 3 x 5 x 5 = 3600 cm = 36 m.

• So they will be together after 36 m.

Answer 2

Answer:

10800cm or 108 m

Step-by-step explanation:

we will take the L.C.M of the length of their steps and that would give us the answer.

L.C.M of (60, 80, 75, 90) comes out to be 10800. so answer is 10800 cm =108m