Work out the percentage of the area inside the square that is shaded.

55%.

Step-by-step explanation:

Since we know that all sides of a square have equal length and perimeter of a square is 4 times the length of one side of square, so we can find length of each side of square by multiplying 40 by 4.  

Now we will find the area of our square with side length 10.

Now we will find the area of shaded region by subtracting the non-shaded area of square from the total area of square. We can see that non-shaded part of our square is in form of two right triangle.

Let us find area of triangle whose base is 10 cm and height is 6 cm (10-4).

Now let us find area of triangle whose base is 10 cm (vertical)  and height is 3 cm (10-7).

Now let us find area of shaded part inside square by subtracting area of two triangles from area of square.

Therefore, area of shaded part inside square is

Now let us find 55 is what percent of 100.

Therefore, 55% of the area inside the square is shaded.                      

this story was prepared by jim

mccullaugh in los angeles and

al stewart in new york.

new york the colossal success of "top gun" appears to have dramatically altered madison avenue's

perception of corporate sponsorship

of home video projects.

the paramount home video re- lease, featuring a 60- second diet

pepsi spot, was by no means the

first prerecorded video to carry an advertiser's plug, but it was the

first major theatrical release to do so. in the aftermath of the title's

success, paramount is widely ex- pected to ink a similar deal for

"crocodile dundee" or "star trek

iv" or both.

corporate america's new attraccds push british

recording sales

to 19% gain

london fueled by the compact

disk boom, the value of u.k. manu- facturer shipments of recordings

rose 19% in the 12 -month period ended march 1987, according to the

british phonographic industry.

total value of u.k. shipments for

the period was $755 million for all

configurations. (all value figures

are based on an exchange rate of

$1.68 to the pound sterling.)

cd sales totaled 10.7 million units

worth $121.3 million- compared

with 3.7 million units worth $39.5

million in the prior 12 months -and

accounted for two -thirds of the

overall gain in trade value. at present growth rates, says the bpi, cd

sales for calendar 1987 will reach 20

(continued on page 79)

step-by-step explanation: