Question

9. In a morning walk four persons start off together. Their steps measure 70 cm, 75 cm, 80 cm
and 85 cm respectively. What is the minimum distance they should walk which each can
cover the distance in complete steps? Give the answer in metres.​

Answer 1

Answer:

Just find the LCM(Lowest Common Multiple) of their footsteps and you shall have your answer

Answer 2

Answer:

prime factorisation

Step-by-step explanation:

L.C.M of 80 cm, 85 cm, and 90 cm.

80=2⁴x5

85=17x5

90=2x3¹x5

lcm of 85,80,90=2³x3¹x5x17

=12240cm

therefore , the answer we get =122m 40 cm or 122.4cm