It is: 4 to 3
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The ratio of 20 cm to 15 cm can be simplified by dividing both numbers by their greatest common factor, which is 5. So, 20 cm to 15 cm simplifies to 4:3. This ratio indicates that for every 4 units of 20 cm, there are 3 units of 15 cm.
To find the ratio of 20 and 15, you divide 20 by 15. The ratio is typically expressed in simplest form, so you would divide both numbers by their greatest common divisor, which in this case is 5. Therefore, the ratio of 20 to 15 is 4:3.
20 cm x 15 cm = 300 cm2
The length is 20 cm.
3/4
Let the breadth be x and the length be x+20 So: 2*(x+x+20) = 100 => 4x+40 = 100 => 4x = 100-40 => 4x = 60 => x = 15 The dimensions are: length = 35 cm and breadth = 15 cm Check for perimeter: 2*(35+15) = 100 cm