Question

The length, breadth and thickness of a block are given by l=12 cm, b=6 cm and t=2.45 cm. The volume of the block according to the idea of significant figure should be

(a) 1 × 10² cm³
(b) 2 × 10² cm³
(c) 1.763 × 10² cm³
(d) 1.76 × 10² cm³

class 11 , chapter 2 - units and measurements.




​

Answer 1

$\huge\bold\star\red{ Given}\star$

∂iмєทsiσทs σƒ τнє вℓσcк,

$lenght(l) = 12cm$

$breadth(b)=6cm$

$hieght (h)=2.45cm$

$\huge\bold\star\purple{Find }\star$

τнє vσℓυмє σƒ τнє вℓσcк αccσr∂iทg τσ τнє i∂єα σƒ sigทiƒicαทτ ƒigυrє.

$\large\mathcal\red{\underline{\overline{\mid{\blue{Sollution}}\mid}}}$

vσℓυмє σƒ τнє вℓσcк=(lbh).

$v= 12*6*2.45$

$v= 176.4cm^{3}$

$v=176.4 * (10^{2}/10^{2})cm^{3}$

$v= 176.4 * 10^{2 }cm^{3}$

$v= 2 * 10^{2} cm^{3}$

$\large\mathcal\red{\underline{\overline{\mid{\blue{Answer}}\mid}}}$

$v= 2 * 10^{2}cm^{3}$

τнє мiทiмυм ทυмвєr σƒ sigทiƒicαทτ ƒigυrє is 1.τнєrєƒσrє, τнє vσℓυмє ωiℓℓ cσทταiท σทℓy σทє sigทiƒicαทτ ƒigυrє.

σρτiσท в is cσrrєcτ.

Answer 2

$\Large{\boxed{\underline{\overline{\mathfrak{\star \: Question :- \: \star}}}}}$

❥ The length, breadth and thickness of a block are given by l=12 cm, b=6 cm and t=2.45 cm. The volume of the block according to the idea of significant figure should be :-

$\Large{\boxed{\underline{\overline{\mathfrak{\star \: Answer :- \: \star}}}}}$

$\large{\boxed{\bold{option\:b\:is\:correct}}}$

$\Large{\underline{\underline{\bf{GiVen:-}}}}$

❥ length of a block ↠ 12cm.

❥ Breadth of a block ↠ 6cm.

❥ thickness of a block ↠ 2.45cm.

$\Large{\underline{\underline{\bf{To find:-}}}}$

❥ The volume of the block according to the idea of significant figure should be :-

$\Large{\underline{\underline{\bf{SoLuTioN:-}}}}$

━━━━━━━━━━━━━━━

❥ As we know that ,

$\large{\boxed{\bold{Volume\:of\:block\:=\:l\:×\:b\:×\:t}}}$

Now ,

✒ length ( l ) ↠ 12cm.

✒ Breadth ( b ) ↠ 6cm.

✒ thickness ( t ) ↠ 2.45cm.

Now ,

✒ putting the values in the above formula

we get ,

⇒ Volume of a block  ↠ 12 × 6 × 2.45

⇒   Volume of a block  ↠ 176.4 cm³

⇒ Volume of a block ↠ 176.4 × ( 10²/10² ) cm³

⇒  Volume of a block ↠ 1.764 × 10² cm³

⇒ Volume of a block ↠ 2 × 10² cm³        

hence,

Option ( b ) is correct .

━━━━━━━━━━━━━━━