The greatest possible length which can be used to measure exactly the length 10m, 10m 80cm, 10 m 90 cm is	Choose the correct choice from the following answers:
A) 15 cm  B) 25 cm  C) 35 cm  D) 10 cm  E) 43 cm
Explanation:   Required Length = H.C.F of 1000 cm, 1080 cm and 1090 c   = 10 cm. Answer: 10 cm
<result>D</result>
The greatest possible length which can be used to measure exactly the length 10m, 10m 80cm, 10 m 90 cm is