ECZ 2017 · O-Level Paper 1 — Computer and Calculator

The diagram below is an incomplete program flow chart to calculate the curved surface area, S, of a cone with base radius r and slant height l. The chart runs Begin → [input box] → [process box] → Output S → End. Which statements correctly complete the blank symbols?

Diagram for ECZ 2017 · O-Level Paper 1
  • A. Input S; then r = πSl
  • B. Input r, l; then S = πrl
  • C. Input r, l; then S = πr2
  • D. Input r, l, S; then Output r

Verified working — step 1

Flowchart shapes have fixed jobs: the input box collects what the formula needs, the process box runs the formula.

The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.

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

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