A rectangle's length is twice its width. If the perimeter is 36, what is the area?
Category: Math · Difficulty: expert
Hint: Use the perimeter formula to express length in terms of width.
Answer
72
Explanation
Let width be w, then length = 2w. The perimeter is 2(2w + w) = 36, solving gives w = 6, length = 12; area = 12 * 6 = 72.
This is a expert math riddle — one of the harder riddles here. The answer is 72.
More Math riddles
- If I have three doors, behind one a prize doth lay, what's the chance you'll make the right choice on your…
- I’m the total of all seconds in an hour, yet when divided by ten, I’m an even flower. What am I?
- If I am 20 on Earth and my twin is in space, how many Earth years does it take for me to age at a different…
- What is the sum of the interior angles of a hexagon?
- A train leaves a station traveling at 50 km/h. After 30 minutes, it increases its speed to 100 km/h. How far…
- You have a 1 in 10 chance of winning a lottery. If you play 5 times, what is the probability that you win at…
- In a clock, I am a quarter past, but subtract my value from 30, what will be your cast? What am I?
- I am a point on a graph where both coordinates are the same positive number. If I am in the first quadrant,…