Given,
Circumference of trunk of tree = 176 cm
Length of the trunk = 3 m = 300 cm
so,
= 2πr = 176
= r = \(\frac{176}{2π}\) = \(\frac{176\times 7}{44}\) = 28 cm
= radius of trunk of tree = 28 cm
hence,
Volume of timber can be obtained from trunk of tree = πr2h = \(\frac{22}{7}\)x 28 x 28 x 300 = 7392 cm3 = 0.74 m3