a hot air balloon rising straight up from a level field is track by a range finder 500ft from the point of lift off. At the moment the lift finder's elevation is 45 degrees, the angle is increasing at the rate of 0.14 rad/min. How fast is the balloon rising/
Following is a discussion on the Reviewer item titled: Problem 271 | Resultant of Non-Concurrent Force System. Feel free to add your own comments!
The lateral area of a frustum of a regular triangular pyramid is 1,081square centimeter and The altitude and the lateral edge are 24cm and 26cm respectively.Find the lengths of the sides of the bases.
Thanks please show me your solution so that I can understand thanks in advance :)
Following is a discussion on the Reviewer item titled: Solution to Problem 535 | Economic Sections. Feel free to add your own comments!
plane areas
Find the area bounded by the curve y = ln x/x, the x-axis and the maximum ordinate.
ans. 1/2
it is required to measure the height of a tower. CB,which is inaccessible. from point A, in the same horizontal plane with the base C, a right triangle CAD is turned, and a horizontal line AD, 150 feet in length, is measured. At A the angle of elevation of the top of the tower is 32 degrees, at D the angle of elevation is 28 degrees. find the height of the tower
Following is a discussion on the Reviewer item titled: Solution to Problem 457 | Moving Loads. Feel free to add your own comments!
Following is a discussion on the Reviewer item titled: Solution to Problem 503 | Flexure Formula. Feel free to add your own comments!
Following is a discussion on the Reviewer item titled: Problem 409 Howe Roof Truss - Method of Joints. Feel free to add your own comments!
I found this illusion from the web, I found it interesting so I posted it here. The question is which line is longer, AB or BC.
Do you know any geometrical illusion? One that involves mathematical concepts is more interesting. Feel free to post it here.
