If A = L x W. . . Then L = A/W
If i am understanding the question correctly, x<10
Since y is less than x by 7 times
so in terms of x we write
x=7y
The First is sec^2(x). Second is 2sec^2tanx. From that you get 2[2sec^2xtan^x+sec^4x]
Answer: 3000cm3
To find the area you need to find the area of the triangle and multiply that by the height of the prism.
The area of the triangle is
.5*12*10 = 60
And the height is .5m = 50cm
So the area will be
60*50 = 3000
