The area of lateral surface is equal that the perimeter multiply by the length. So the lateral surface area of roll A is 3*π*30=90π. Roll B: d*π*24=24dπ. Put them together: 90π=24dπ. So d=3.75 in.
Answer:
I think the answer is 7×2+8
7×2=14+8=22.
<span>20 - 12y
Simplify parentheses: 4 - 5y - 7y + 16
Combine similar terms: 4 + 16 - 5y - 7y
Simplify: 20 - 12y</span>
We know one side of the smaller rectangle, 6ft. Therefore the longer side is 78/6 ft = 13ft.
The ratio of small to large side is 6:10, so the larger rectangles other length is (13 / 6) * 10 ft = 21.666... ft.
Thus the area of the larger rectangle is 21.666... * 10 = 216.666... ft^2, and hence to the nearest whole number it is 217 ft^2
