Question

The area of a rectangle can be found by multiplying the length and the width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide? (round it to the nearest integer)

• A. $50c{m}^2$
• B. $51.7c{m}^2$
• C. $51.74c{m}^2$
• D. $51.744c{m}^2$
• E. $52c{m}^2$

Answer 1

The correct option is E $52c{m}^2$

Area $=$ length $\times$ width $=5.6$ cm $\times 9.24$ cm $=51.7$ cm ${}^2$
But the answer will have 2 significant figures as 5.6 cm has 2 significant figures and 9.24 cm has 3 significant figures.
The result of division or multiplication must be reported to the same number of significant figures as possessed by the least precise term.