A piece of wood is 0.640 m long, 0.260 m wide, and 0.070 m thick. Its density is 700 kg/m3.

A piece of wood is 0.640 m long, 0.260 m wide, and 0.070 m thick. Its density is 700 kg/m3.

A)

What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just even with the water level?

Express your answer using two significant figures.

B)

What is the mass of this volume of lead?

Express your answer using two significant figures.