Question

The length of a red ribbon is 30 cm and that of white ribbon
is 42 cm. Find the length of the longest piece that can be cut
from both the ribbon.​

Answer 1

Step-by-step explanation:

HCF of 30 and 42

42 = 30 × 1 + 12

30 = 12 × 2 + 6

12 = 6 × 2 + 0

so the longest ribbon that can be cut from both red and white ribbon is 6 cm