Question

the perimeter of a rectangle is 18 cm and the length is 15 cm .find its breadth and area​

Answer 1

Appreciate Question :

the area of a rectangle is 18 cm and the length is 15 cm .find its breadth and perimeter

Formula Used :

• Perimeter = 2(Length + Breadth)

• Area = Length × Breadth

GivEn Data :

Area = 18 cm²

Length = 15 cm

Let us assume :

Let the Breadth be taken x

Solution :

Using the 2nd formula we get,

Area = Length × Breadth

18cm² = 15 cm × x

x = 18/15 cm

x = 6/5 cm

Hence, Breadth is 6/5 cm

Now applying the 1st formula we get

Perimeter = 2(Length+ Breadth)

$\sf Perimeter = 2(15cm + \frac{6}{5} cm)$

$\sf Perimeter = 2( \frac{75}{5}cm + \frac{6}{5} cm)$

$\sf Perimeter = 2 \times \frac{81}{5} cm$

$\sf Perimeter = \frac{162}{5} cm$

$\sf Perimeter = 32.4cm$

Answer 2

Answer:

$2$

Step-by-step explanation:

Area = 15 × 6.4 cm square

= 96 cm square

(ii) Area = 8.5 × 5 metre square

= 42.5 metre square

(iii) USING. 1 metre = 100 centi metre

90 cm in metre = 0.9 m

Area = 0.9 × 3.6 metre square

= 3.24 metre square

(iv) l = 24 cm

b = 180 mm

USING 1 centi metre = 10 mm

b in cm = 18 centi metre

Area = 24 × 18 cm square

= 432 cm square