Question

7. What will be the least possible number of the planks, if three pieces of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length?
a) 5
b) 6
c) 7
d) 9​

Answer 1

Answer:

7

Step-by-step explanation:

because lcm of 42cm, 49cm and 63cm is 7.