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the length,breath and thickness of a rectangular sheet of metal are 4.234 m , 1.005 m , and 2.01 cm respectively. Give area and volume of the sheet upto correct  significant figures.
Asked by manchanda.rohnit | 22 May, 2020, 01:24: PM
answered-by-expert Expert Answer
length, l = 4.234 m - length has 4 signifcant figures 
breadth, b = 1.005 m - breadth has 4 significant figures
thickness, h = 2.01 cm = 0.0201 m - height or thickness has 3 significant figures. 
 
Thus, the area and volume must have 3 significant figures in its final value after calculation. 
 
S u r f a c e space a r e a space o f space t h e space g i v e n space s h e e t space equals space 2 left parenthesis l b plus b h plus h l right parenthesis
equals space 2 open parentheses 4.234 cross times 1.005 plus space 1.005 cross times 0.0201 space plus thin space 0.0201 cross times 4.234 close parentheses
equals 2 space left parenthesis 4.2552 plus 0.02620 plus 0.080510 right parenthesis
equals 2 cross times 4.360 space
equals space 8.72 space m squared space

V space equals space l b h space equals space 4.234 cross times 1.005 cross times thin space 0.0201 space equals space 0.0855 space m cubed
Answered by Shiwani Sawant | 22 May, 2020, 10:22: PM
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