The length , breadth and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct significant figures.

Explanation

Here, length l = 4.234 m,
`" "`Breadth, b = 1.005 m
Thickness, `t=2.01 cm=2.01 times 10^(-2)m`
Area of the sheet `=2(l times b+ b times t +t times l)`
`=2(4.234 times 1.005+1.005 times 0.0201+0.0201 times 4.234)`
`=2(4.3604739)=8.7209478" "m^(2)`
As area can contain a maximum of three significant digits, therefore, rounding off, we get
Area = `8.72m^(2)`
Also, volume `=l times b times t`
`" "V=4.234 times 1.005 times 0.0201`
`" "V=0.0855289`
`" "V=0.855m^(3)`