Question

Fill in the blanks for a rectangle.

Length (in cm)	$3$	$5$	$10$	$12$		$8$	$11$
Breadth (in cm)	$5$	$8$	$15$		$14$
Perimeter (in cm)						$42$
Area in cm square				$96$	$210$		$88$

Accepted Answer

We know that, area of rectangle with length $' l'$ and breadth $' b'$ is $l \times b$ and perimeter is $12$ .

For first one,
$l = 3 cm, b = 5 cm$

Perimeter is $2 (3 + 5) = 16 cm$ .

Area is $5 \times 3 = 15 {cm}^{2}$ .

Second one,
Perimeter is $2 (5 + 8) = 26 cm$ .
Area is $5 \times 8 = 40 {cm}^{2}$ .

Third one,
Perimeter is $2 (10 + 15) = 50 cm$ .
Area is $10 \times 15 = 150 {cm}^{2}$ .

Fourth one,
Length is $12 cm$ , breadth $b$ .
Area is $96 {cm}^{2}$
$12 \times b = 96 b = 8 cm$
Perimeter is $2 (12 + 8) = 40 cm$ .

Fifth one,
Breadth is $14 cm$ .
Area is $210 {cm}^{2}$ .
$14 \times l = 210 l = 15 cm$
Perimeter is $2 (15 + 14) = 58 cm$ .

Sixth one,
Length is $8 cm$ .
Perimeter is $42 cm$
$\Rightarrow 2 (8 + b) = 42 \Rightarrow b = 13 cm$ .
Area is $8 \times 13 = 104 {cm}^{2}$ .

Seventh one,
Length is $11 cm$ .
Area is $88 {cm}^{2}$ .
$\Rightarrow 11 \times b = 88 \Rightarrow b = 8 cm$ .
Perimeter is $2 (11 + 8) = 38 cm$ .

Length (in cm) $3$ $5$ $10$ $12$ $15$ $8$ $11$

Breadth (in cm) $5$ $8$ $15$ $8$ $14$ $13$ $8$

Perimeter (in cm) $16$ $26$ $50$ $40$ $58$ $42$ $38$

Area in cm square $15$ $40$ $150$ $96$ $210$ $104$ $88$

Side (in cm)	$4$	$6$	$10$	$15$
Perimeter								$72$	$80$
Area					$49$	$121$	$441$

S K Gupta and Anubhuti Gangal Solutions for Exercise 5: Exercise

S K Gupta Mathematics Solutions for Exercise - S K Gupta and Anubhuti Gangal Solutions for Exercise 5: Exercise

Questions from S K Gupta and Anubhuti Gangal Solutions for Exercise 5: Exercise with Hints & Solutions

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