Inner radius of cylindrical pipe, say r1 = diameter12=242cm=12 cm
Outer radius of cylindrical pipe, say r2 =diameter22=282cm=14 cm
Height of pipe, h = Length of pipe = 35cm
Now, the Volume of pipe = π (r22 - r12) h cm3
Substitute the values.
Volume of pipe = 227×(142−122)×35
=110 × 52
= 5720 cm3
Since, Mass of 1 cm3 wood = 0.6 g
Mass of 5720 cm3 wood = (5720 × 0.6) g
= 3432 g or 3.432 kg.