Question:
The length, breadth and thickness of rectangular sheet of metal are 4 324m, 1 005m, and 2 01 cm respectively Give the area and volume of the sheet to correct significant figures
Answer:A=2×(L×B+B×T+T×L)
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=8.721m2
∴A=8.721m2 to correct significant digits
V=L×B×T
∴V=4.234×1.005×0.0201
∴V=0.0855m3 to correct significant digits
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