Three persons start walking together and their steps measure 40 cm , 42 cm and 45 cm respectively . What is the minimum distance each should walk so that each can cover the same distance in complete steps ?

Options

A. 25 m 20 cm
B. 50 m 40 cm
C. 75 m 60 cm
D. 100 m 80 cm

Answer

A

Explanation

Required minimum distance = L.C.M of 40 , 42 and 45.

L.C.M = `2 xx 2 xx 2 xx 5 xx 3 xx 3 xx 7 = 2520`
Required distance = 2520 cm = 25 m 20 cm