Homework Help: maths

Posted by chelsea on Saturday, June 6, 2009 at 5:07am.

A paving block is is in the shape of a prism, the area of it' cross section being 154cm^2.The prism i 17cm long ad the material from whih it is made has a density of 2.2g/cm^3. Calculate the mass of the paving block.

Please can you tell me the method aswell

thanks

maths - MathMate, Saturday, June 6, 2009 at 6:38pm
Volume of prism
= cross-sectional area * height
= 154 cm² * 17 cm
= 2618 cm³
Density = 2.2 g / cm³

Mass
= volume * density
= 2618 cm³ * 2.2 g / cm³

= 5759.6 g
= 5760 g (approx.)

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