Question

A circular carpet of diameter 7 m has 7m wide red border.
The inner part of the carpet is blue in colour. Find the area
of blue portion. What is the ratio of areas of red portion to
blue portion ?​

Answer 1

Answer:

III. Fill in The blanks :

1._form an IP address.

2 A_is a software program that allows access to www.

3. The_consists of files, called web pages that conatins links todocuments through Internet.

4._stores the information about any organisation or individual.

5._consists of two parts separated by dots.

Answer 2

Convert al to cm:

5m = 500 cm

2m = 200 cm

.

Area of the whole carpet = 500 x 200 = 100 000 cm²

.

Find Length and breadth of the blue portion:

Length = 500 - 25 - 25 = 450 cm

Breadth = 200 - 25 - 25 = 150 cm

.

Find area of the blue portion:

Area = Length x Breadth

Area = 450 x 150 = 67500 cm²

.

Find the area of the red portion:

Area = 100 000 - 67500 = 32500 cm²

.

Ratio of the red portion to blue portion:

Red : Blue = 32500 : 67500 = 1 : 27

.

Answer: 1 : 27