How much would a 5x4 meter, 8 inch thick piece of titanium weigh?

Step-by-step explanation:

Density Titanium: 4.506 grams / cm^3

Conversions

5 meters by 4 meters = 500 cm * 400 cm = 200000 cm^2

1 inch = 2.54 cm

8 inches = x

1/8 = 2.54 / x Cross multiply

1*x = 2.54*8

x = 20.32 cm.

Volume

Volume = base * h

Volume = 200000 * 20.32

Volume = 4064800 grams

Weight

Weight = density * volume

Weight = 20.32 * 4064800

Weight = 82580480 grams

Weight = 82580.0 kg

Technically, though common usage calls kg a weight, it really is not. It is a mass. To get the weight, you must multiply by the gravitational constant with is 9.81 newtons

Weight = 82580 * 9.8

Weight = 809288 Newtons.