Which greatest possible length can be used to measure exactly 10 meter 40 cm, 14 meter 10 cm and 7 meter 90 cm  Choose the correct choice from the following options
A) 45cm
B) 25cm
C) 24cm
D) 15cm
E) 10cm
Explanation:   Convert first all terms into cm.   i.e. 1040 cm, 1410cm, 790cm.   Now whenever we need to calculate this type of question, we need to find the HCF. HCF of above terms is 10.   Option 10cm
<result>E</result>
Which greatest possible length can be used to measure exactly 10 meter 40 cm, 14 meter 10 cm and 7 meter 90 cm