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0580/33 May/Jun 2023, Question 4: Speed, Distance and Time

Cambridge IGCSE Mathematics 0580 · Paper 33 (Core) · Calculator · 12 marks

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The question, in short

Use a distance-time graph of a boat's trip from A to B to C to read times, complete the graph and find average speed.

Summarised in our own words. Use the official paper for the exact wording and the diagram.

Part (ai) · 1 mark

Read off the departure time from A on the graph's time axis.

  1. 1The line starts at distance 0 at 10 20
  2. 210 20

Answer10 20

Part (aii) · 1 mark

Find the journey duration from A to B in minutes using the graph.

  1. 1The boat reaches B (6 km) at 11 00
  2. 211 00 − 10 20 = 40 minutes

Answer40

Part (aiii) · 2 marks

Add a 20-minute stop at B then a constant 8 km/h leg to C at 18 km.

  1. 1Stay at B: horizontal line from (11 00, 6) to (11 20, 6)
  2. 2B to C: 18 − 6 = 12 km at 8 km/h takes 12 ÷ 8 = 1.5 h
  3. 3Arrives at 11 20 + 1 h 30 min = 12 50
  4. 4Ruled line from (11 20, 6) to (12 50, 18)

AnswerRuled lines from (11 00, 6) to (11 20, 6) and (11 20, 6) to (12 50, 18)

Part (aiv) · 3 marks

Calculate average speed in km/h over the entire A to C trip.

  1. 1Total time = 10 20 to 12 50 = 2 h 30 min = 2.5 h
  2. 2Average speed = 18 ÷ 2.5 = 7.2 km/h

Answer7.2

Part (bi) · 1 mark

Measure the bearing of Y from X on the scale drawing.

  1. 1Measure clockwise from the North line at X to the line XY
  2. 2Bearing = 065°

Answer065 (accept 063 to 067)

Part (bii) · 2 marks

Mark point B on the drawing, 52 km from X and 80 km from Y using 1 cm to 8 km.

  1. 152 ÷ 8 = 6.5 cm and 80 ÷ 8 = 10 cm
  2. 2Draw an arc of radius 6.5 cm centre X and an arc of radius 10 cm centre Y
  3. 3B is where the arcs cross (in the sea)

AnswerB correctly marked 6.5 cm from X and 10 cm from Y

Part (biii) · 2 marks

Work out the reverse bearing of X from S given S lies on 284° from X.

  1. 1Bearing of X from S = 284 − 180
  2. 2= 104°

Answer104

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Also searched as: 0580/33/M/J/23 · 0580_s23_qp_33 · 0580 s23 33 · question 4.
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