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  1. Three pieces of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length, What is the greatest possible length of each plank ?
    1. 7 m
    2. 14 m
    3. 42 m
    4. 63 m
Correct Option: A

Greatest possible length of each plank = H.C.F of 42, 49, 63 = 7 m


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