111. The mass of substance is \(75.5 gm\) and its volume is \(25 cm^{3}\). It’s density up to the correct significant figure is
A. \(3.02\ gm/cm^{3}\)
B. \(3.200\ gm/cm^{3}\)
C. \(0.302\ gm/cm^{3}\)
D. \(3.1\ gm/cm^{3}\)
Answer : Option A
Explanation :
\(density=\frac{mass}{volume}=\frac{75.5}{25}\)
\(=3.02\ gm/cm^{3}\)
112. The area of a rectangle of size \(1.25\times 2.245\ cm^{2}\) in significant figure is
A. \(2.80625\ cm^{2}\)
B. \(2.81\ cm^{2}\)
C. \(2.806\ cm^{2}\)
D. \(2.8062\ cm^{2}\)
Answer : Option B
114. Addition of measurement 15.225 cm, 7.21 cm and 3.0 cm in significant figure is
115. Subtract 0.2 J from 7.36 J and express the result with correct number of significant figures.
116. After rounding of the number 9595 to 3 significant digits the value becomes
117. How many significant numbers are there in \((2.30+4.70)\times 10^{5}\) ?
118. The radius of circle is 1.26 cm. According to the concept of significant figures area of it can be represented as
A. \(4.9850\ cm^{2}\)
B. \(4.985\ cm^{2}\)
C. \(4.98\ cm^{2}\)
D. \(9.98\ cm^{2}\)
Answer : Option C
119. If A = 3.331 cm B = 3.3 cm then with regard to significant figure A + B =
120. If the length of rod A is \((2.35\pm 0.01)\ cm\) and that of B is \((5.68\pm 0.01)\ cm\) then the rod B is longer than rod A by
A. \((2.43\pm 0.00)\ cm\)
B. \((3.33\pm 0.02)\ cm\)
C. \((2.43\pm 0.01)\ cm\)
D. \((2.43\pm 0.001)\ cm\)
Answer : Option B