A rectangle has parameter of 24 unit, if width is 4 unit what is length.

10 unit
6 unit
16 unit
8 units
My answer is 16 unit..
I wan a make sure if I am right.

No, that isn’t right.

Parameter of a rectangle is the sum of 4 sides with opposite sides equal. If width is 4, both sides would be 8. Subtract 8 from 24 to get sum of other two equal sides, which is 16, divided by two would be 8. The length is 8 units.

To find the length of a rectangle given its perimeter and width, you need to use the formula for the perimeter of a rectangle, which is P = 2L + 2W, where P is the perimeter, L is the length, and W is the width.

In this case, you are given that the perimeter is 24 units and the width is 4 units. So we can substitute these values into the formula:
24 = 2L + 2(4)

Simplifying the equation:
24 = 2L + 8

Subtracting 8 from both sides:
16 = 2L

Dividing both sides by 2:
L = 8

Therefore, the length of the rectangle is 8 units, not 16 units.