The greatest possible length which can be used to measure exactly the length 6m, 4m 20cm, 4m is	Choose the correct choice from the following
A) 20 B) 27 C) 35 D) 87 E) 98
Explanation:   Required Length = H.C.F of 600 cm, 420 cm and 400 c   = 20 cm.   20nswer: 20) 20 cm
<result>A</result>
The greatest possible length which can be used to measure exactly the length 6m, 4m 20cm, 4m is