Question

Rectangle with dimensions 40cm and 30cm

Answer 1

Answer:

breadth is equal to 8cm

Step-by-step explanation:

Given that

P = 40, l = 12

As we know that

Perimeter of Rectangle (P) = 2 * (length + breadth)

ie. P = 2*(l+b)

=> 40 = 2 * (12 + b)

=> 40 / 2 = [2*(12 + b)]/2 (Divide both side by 2)

=> 20 = 12 + b

=> 20 - 12 = 12 - 12 + b (Subtract 12 from both side)

=> 8 = b

=> b = 8

Ans: Breadth is 8cm

Answer 2

Answer:

Step-by-step explanation:

Perimeter of the rectangle = 2(length + breadth)

                              We can take 40 cm as length and 30 cm as breadth

                                             = 2(40+30)

                                             = 2 x 70

                                            140 cm

Converting Cm to M

1 CM = 100 M

140 CM / 100 M

=1.4 M