Three pieces of timber 54 m, 63 m and 81 m long have to be divided into planks of the same length, What is the greatest possible length of each plank ?
Choose the correct answer:
A) 9 m
B) 4 m
C) 4 m
D) 6 m
E) None of these
9 mnswer   Greatest possible length of each plank = H.C.F of 54, 63, 81 = 9 m   Correct Option: 9 m
<result>A</result>
Three pieces of timber 54 m, 63 m and 81 m long have to be divided into planks of the same length, What is the greatest possible length of each plank ?