the length breadth and thickness of a rectangular plate of a metal are respectively 4,234 m, 1.005 and 2.01 cm. calculate the area and volume of the plate up to proper significant figures.
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Answer:
A=2×(L×B+B×T+T×L)
∴A=2×(4.234×1.005+1.005×0.0201+0.0201×4.234)
∴A=2×(4.2552+0.0202+0.0851)
∴A=8.721m
2
∴A=8.721m
2
to correct significant digits
V=L×B×T
∴V=4.234×1.005×0.0201
∴V=0.0855m
3
to correct significant digits
I AM MATH TEACHER IN DELHI PUBLIC SCHOOL
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