NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area - Problems and Solutions

Question 111

Question. 111

Carpet = 5 m × 2 m, border 25 cm. Find blue area and ratio red:blue.

Answer:

Blue = 6.75 m², Ratio = 13:27

Detailed Answer with Explanation:

Outer area = 10 m², inner (4.5 × 1.5 = 6.75 m²).

Red = 3.25 m², ratio = 13:27.