Convert 15 meters per second into kilometers per hour.

15m/s = 54km/hr

Step-by-step explanation:

= 54 km/hr

Hope this helps!

P = 6 + 4w

Step-by-step explanation:

The length of a rectangle is 3 times greater than its width

Therefore the perimeter of a rectangle can be calculated as follows

P= 2L + 2w

P = 2(w + 3) + 2w

P= 2w + 6 + 2w

P= 6 + 4w

Hence the expression which gives the perimeter of the rectangle in terms of its width is P = 6 + 4w