Short Answers of Mensuration (Mathematics B /4MB1)

 Mensuration (2014-2016)

1.  (a) $4000\pi$ cm$^3$ (b) $40\pi r^3,r=4$
2.   Fraction $=35 \% \quad$
3.   $129 \mathrm{~cm}^2$
4.   $h=14$
5.   $7 .3 \mathrm{~cm}^3$
6.   (a) $3.6 \times 10^{-3} $ (b) $ 5000 \quad$
7.   $1260 \mathrm{~mm}^3 \quad $
8.   $ r=3 \mathrm{~cm} \quad$
9.   $ h=18 \mathrm{~cm}$ 
10.   $r=5$
11.   $45.5 \mathrm{~cm}^2 \quad$
12.   Slant height $=41,450 \pi \quad $
13.   Volume $=2.27 \times 10^6 \mathrm{~m}^3$.
14.   $h( cone )=2 r$. height $r+2 r=3 r$
15.   (a) $ r=2.4 \mathrm{~cm} \quad$ (b) $ 706 / 705\left(\mathrm{~cm}^3\right)$  (c) $\operatorname{time}(s)=13$
16.   $ 30 $
17.   (a) radius $=6 \mathrm{~cm} $ (b) $12^2-\pi 36 $ (c) $21.45>21.5$ OR. $21.43>21.4$
18.   $107\left(\mathrm{~cm}^2\right)$
19.   (a) Area $=\frac{36}{5 \pi} \mathrm{cm}^2$ (b) $\frac{12(\pi+5)}{5 \pi}$
20.   (a) $r=16.6 \mathrm{~cm}$ (b) $54.9 \mathrm{~cm}$
21.   (a) $29.3 \mathrm{~cm}$ (b) $4.66 / 4.67$ (c) $13.2 \mathrm{~cm} \quad$
22.   $5 .2 \mathrm{~cm}, \frac{5}{3} \pi$