4MA1/1HR Jun 2020, Question 19: Upper and Lower Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 3 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Using four lengths given to one decimal place, find the upper bound of the shaded area formed by rectangle ABCD with rectangle EFGH removed.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1For the upper bound, use the largest outer rectangle and the smallest cut-out.
- 2Outer upper bound: 8.35 × 7.25 = 60.5375
- 3Cut-out lower bound: 6.15 × 5.25 = 32.2875
- 4Shaded upper bound = 60.5375 − 32.2875 = 28.25
Answer28.25
Stuck on a step? Read the free lesson: Upper and Lower Bounds
Practise more upper and lower bounds questions
Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on upper and lower bounds
Also searched as: 4MA1 1HR June 2020 · 4MA1/1HR · 4ma1 jun20 1hr · question 19.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.