A=3 дм 4 см б=4дм ц=6 дм С=?

To find the value of C, we need to add up the given lengths of A, B, and C.

Given: A = 3 dm 4 cm B = 4 dm C = 6 dm

Converting from dm to cm: A = 3 dm = 3 * 10 cm = 30 cm B = 4 dm = 4 * 10 cm = 40 cm C = 6 dm = 6 * 10 cm = 60 cm

Now we can add the lengths together to find the value of C: C = A + B C = 30 cm + 40 cm C = 70 cm

Therefore, C = 70 cm.