A surveyor measured the angle of elevation of a flat spire as 15 degree from a point

11.28m

Step-by-step explanation:

The computation of the height of the spire is shown below:

let us assume the height of the spire be x

Now

For triangle ABD

Tan 43 degrees = h ÷ x

x = h × cot 43 degrees

= 1.07236 h

For triangle ABC

tan 15 degrees = h ÷ (30 + x)

0.2679 = h ÷ 30 + 1.07236h

8.038 + 0.28728 h = h

h = 11.28m

Find Out What You’ll be Tested On

While it might be interesting to read around the subject (and helpful in many cases), exams are based on a specific set of topics and skills. Firstly, find out which exam board will be setting your exam. They provide specifications for each of the exams they set. These are easily accessible from a quick internet search if you haven’t been given one by your teacher.

Use this as the basis for what you’ll revise in terms of themes and topics. You should also make sure you know what skills will be tested too. For example, will you need to be able to draw graphs? Will you need to extract information from a passage of text? How about arguing a particular viewpoint?

Step-by-step explanation:

Create a Revision Timetable

Once you know what you’ll be tested on, how can you guarantee that you’ll actually put the time and effort in? One of the best ways to revise is to use a revision timetable. Not only do they hold you accountable for studying when you’re supposed to, but they can be a great motivator as you mark off each day that you complete.

A revision timetable doesn’t need to be elaborate. It can be as simple as a spreadsheet or a written schedule. If you prefer a more technological approach however, why not try a free revision timetable app like Adapt, which calculates the perfect amount of revision for each day. Or, why not try Get Revising’s free revision timetable builder? Here’s an overview of how it works: