The length of a rectangle is twice the width. The perimeter is 85 cm more than the width. Make a diagram and find the rectangles dimensions. P=2l+2w

Question

lucaz · Answer

the perimeter is the sum of the sides, a rectangle has 4 sides, 2 widths and 2 lenghts

lucaz · Answer

the length is twice the width, length = 2*width

lucaz · Answer

perimeter P=2*length+2*width
P=2*(2*width)+2width

lucaz · Answer

solve the equation for w and go back to length = 2*w to find it's value

anonymous · Answer

What's the equation

anonymous · Answer

Is it w+85=2l+2w

lucaz · Answer

P=2*(2*width)+2width
solve this equation to find the width

anonymous · Answer

So 85=5w and divide and get 17 so length equals 17

anonymous · Answer

?

lucaz · Answer

it seems we have a some decimals, do you have the answer?

lucaz · Answer

just to check

anonymous · Answer

85/5 is 17

lucaz · Answer

but it is not 5, it's 6, w = 85/6

lucaz · Answer

2*2w+2w = 4w+2w = 6w

lucaz · Answer

85/6 is approx. 14.16, the witdh is 14.16, the length is twice the witdh,
2*14.16 = 28.32
P = 2l+2w
85 = 28.32*2 + 14.16*2 = appox. 84.96, almost 85..