Answer:
Each piece will be 8 inches
Explanation:
We have to find the HCF / GCF of 80 and 64
80 = 2 * 2 * 2 * 2 * 5
64 = 2 * 2 * 2 * 2 * 2 * 2
HCF = 2 *2 *2 = 8
80 inches = 8 * 10 . So, 10 boards each measuring 8 inches
64 = 8 * 8 . So, 8 boards each measuring 8 inches