Question

Given $P=0.0030m,Q=2.40m,R=3000m$ Significant figures in $P,Q$ and $R$ are respectively

• A. $2,2,1$
• B. $2,3,4$
• C. $4,2,1$
• D. $4,2,3$

Answer 1

Answer: (B)

Given $P=0.0030m,Q=2.40m$ and $R=3000mInP(0.0030)$ initial zeros after the decimal point are not significant. Therefore, significant figures in $P(0.0030)$ are $2$. Similarly in $Q(2.40)$ significant figures are $3$ as in this case final zero is significant. In $R=(3000)$ all the zeroes are significant hence, in $R$ significant figures are $4$.