Lemmara logoLemmaraWorked solution

4MA1/2FR Jan 2021, Question 7: Time Calculations

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 8 marks

اقرأ هذا الحل مشروحاً بالعربي ←

The question, in short

Using five 24-hour clock times in a table, find the closest to 6 pm, a time gap, a chicken weight from a cooking rule, and a formula for cooking time.

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

Part (a) · 1 mark

Identify which of the five listed times is closest to 6 pm and give its letter.

  1. 16 pm is 18:00 on the 24-hour clock
  2. 2D is 18:12, only 12 minutes away; the next closest, E, is 1 h 15 min away
  3. 3So the time nearest to 6 pm is D

AnswerD

Part (b) · 2 marks

Calculate how many hours and minutes separate time A from time E.

  1. 1From 11:53 to 12:00 is 7 minutes
  2. 2From 12:00 to 16:45 is 4 hours 45 minutes
  3. 3Total = 4 hours 52 minutes

Answer4 hours 52 minutes or 4:52

Part (c) · 3 marks

Given cooking starts at time B and ends at time E, use the rule (weight in kg × 40, plus 15) to find the chicken's weight.

  1. 1From 15:20 to 16:45 is 1 hour 25 minutes = 85 minutes
  2. 2Rule: weight × 40 + 15 = 85
  3. 3weight × 40 = 70, so weight = 70 ÷ 40 = 1.75

Answer1.75

Part (d) · 2 marks

Write a formula expressing T, the cooking minutes, in terms of k, the chicken's weight in kilograms, using the given rule.

  1. 1Multiply weight k by 40: 40k
  2. 2Add 15: 40k + 15
  3. 3So T = 40k + 15

AnswerT = 40k + 15

Stuck on a step? Read the free lesson: Time Calculations

Practise more time calculations questions

Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.

Practise free on Lemmara

More past-paper questions on time calculations

Also searched as: 4MA1 2FR January 2021 · 4MA1/2FR · 4ma1 jan21 2fr · question 7.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.