Math, asked by theabhisheksha, 1 month ago

Please right answer Dena.

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Answered by lalitameena9055

Answer:

the formula of rectangle is 2*l+2*b

Step-by-step explanation:

as, we put 3 in the place of l and 4 in the place of b . so the answer is 2*3+4 = 2*7=14

2. we put 12 in the place of l and 21 in the place of b

.2*12+21=2*33=66

3. we put 2 in the place of l and 3 in the place of b

2*2+3=2*5=10

Answered by samruddhishitole4546

Answer:

(a) 12 cm.

(b) 252m.

(c) 6km.

Step-by-step explanation:

(A) Area of rectangle = l × b

= 3 cm × 4 cm

= 12 cm.

(B) Area of rectangle = l × b

= 12m × 21 m

= 252 m.

(C) Area of rectangle = l × b

= 2 km × 3 km

= 6 km.

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