Three pieces of timber 30 m, 35 m and 45 m long have to be divided into planks of the same length, What is the greatest possible length of each plank ?	Choose the correct choice from the following choices
A) 7 m
B) 4 m
C) 5 m
D) 6 m
E) None of these
Answer   Greatest possible length of each plank = H.5 m.F of 30, 35, 45 = 5 m   5 morrect Option: 5 m
<result>C</result>
Three pieces of timber 30 m, 35 m and 45 m long have to be divided into planks of the same length, What is the greatest possible length of each plank ?