Question

find the area of a rectangle , whose length is 3.9 cm and breadth is 5 cm​

Answer 1

Answer:

19.5

Step-by-step explanation:

area of a rectangle =l×b

area of rectangle = 3.9×5

=19.5

hope it will help you

Answer 2

GIVEN :–

• Length = 3.9 cm

• Breadth = 5 cm

TO FIND :–

• Area of rectangle = ?

SOLUTION :–

• If Length is 'l' and breadth is 'b' , Then area –

$\\ \: \: \longrightarrow \large \: \: \: \: { \boxed{ \bold{Area = l \times b}}}$

• Put the values –

$\\ \implies { \bold{Area = (3.9) \times (5)}}$

• We should write this as –

$\\ \implies { \bold{Area = (3.9) \times \left( \dfrac{10}{2} \right)}}$

$\\ \implies { \bold{Area = \left( \dfrac{39}{2} \right)}}$

$\\ \implies \large{ \boxed { \bold{Area =19.5 \: \: cm^{2} }}}$

IMPORTANT FORMULA :–

$\\ { \bold{ \: (1) \: \: Perimeter \: \: of \: \: rectangle =2(l + b)}}$

$\\ { \bold{ \: (2) \: \: Area \: \: of \: \: rectangle =2(l \times b)}}$