Question

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

Answer 1

Area of the sheet = 2(l × b + b × t + t × l)

= 2(4.234 × 1.005 + 1.005 × 0.0201 + 0.0201 × 4.234)m²

= 2 (4.255 + 0.0202 + 0.0851)m²

= 2 × 4.3603m²

= 8.7206m²

= 8.72m²

Volume = lbt

4.234 × 1.005 × 0.0201m³

= 0.0855m³