Foundation January 2021 Paper 2R Q7

EdexcelCurrent spec8 marksUnits & Time

7 Here are five times, in a single day, using the 24-hour clock.

A	B	C	D	E
11 53	15 20	08 20	18 12	16 45

(a) Write down the letter of the time nearest to 6 pm (1)

(b) Work out the difference, in hours and minutes, between time A and time E. (2)

Francesco uses the rule below to find the time, in minutes, to cook a chicken in his oven.

Number of minutes to cook a chicken
Multiply the weight of the chicken, in kg, by 40 and then add 15

The clock on Francesco’s oven shows time B.
Francesco starts cooking a chicken at this time.
He stops cooking the chicken when the clock on his oven shows time E.

(d) Use Francesco’s rule to write down a formula for the time, \(T\) minutes, to cook a chicken of weight \(k\) kilograms. (2)

Scheme	Marks
D	B1
	(1)

Scheme	Marks
4 hours 52 minutes	B1 B1
	(2)

Mark scheme (c)

Scheme	Marks
time = 40 + 45 (= 85 minutes oe) or 1 hr 25 min	M1
(“85” – 15) ÷ 40	M1
1.75	A1
	(3)

Notes

M1: accept 60 + 25
May be implied by 70 ÷ 40

M1: dep 1st M1

A1: oe eg 1.750 or \(\dfrac{7}{4}\)

Scheme	Marks
\(T = 40k + 15\)	B2
	(2)
	(8 marks)