A square of side 10 cm has a smaller square (of side 4 cm) removed from one side. What is the ratio of the remaining area to the original?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 21:25
Area of big square = side2
Area = 102
Area = 100
Area of small square = 42
Area = 16
Remaining area = 100 − 16
Remaining area = 84
Ratio = Remaining : Original
Ratio = 84 : 100
Ratio = 21 : 25