ECZ 2020 · GCE Paper 2 · Question 4 — Computer and Calculator

A programme is given in pseudocode: Start; Enter radius; If radius < 0 Then display 'error message' and re-enter positive radius; Else enter slant height; If slant height < 0 Then display 'error message' and re-enter positive slant height; Else Area = π * r * (r + slant height); End if; Display Area; Stop.

(a) Draw the corresponding flow chart for the information given above.[5]

Verified working — step 1

Flowchart description:

(b) Express 2x - 1- 31 - xas a single fraction in its simplest form.[3]

Verified working — step 1

2x-1- 31-x

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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