JEE PYQ: Experimental Physics Question 25
Question 25 - 2019 (10 Jan 2019 Shift 2)
The diameter and height of a cylinder are measured by a meter scale to be $12.6 \pm 0.1$ cm and $34.2 \pm 0.1$ cm, respectively. What will be the value of its volume in appropriate significant figures?
(1) $4264 \pm 81$ cm$^3$
(2) $4264.4 \pm 81.0$ cm$^3$
(3) $4260 \pm 80$ cm$^3$
(4) $4300 \pm 80$ cm$^3$
Show Answer
Answer: (3)
Solution
Volume $V = \pi r^2 h = \pi \left(\frac{d}{2}\right)^2 h$. The answer with appropriate significant figures is $4260 \pm 80$ cm$^3$.
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