Compound Measures: WJEC GCSE Foundation June 2025 Unit 1 Q20

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Foundation June 2025 Unit 1 Q20

WJECFoundationCurrent spec3 marksCompound Measures

20. Geraint cycles 18 miles in 1 hour 30 minutes.
Calculate Geraint’s average speed.
Give your answer in miles per hour. [3]

Mark scheme

Scheme	Marks	Comments
18 ÷ 1·5 or equivalent	M2	May be seen in stages. Must be a complete and correct method e.g. \(\dfrac{18}{90}\) × 60 or 60 ÷ \(\dfrac{90}{18}\) or 18 ÷ 3 = 6 with 6 × 2 or 18 miles in 90 minutes then 1 mile in 5 minutes then 60 ÷ 5. Allow M1 for sight of one of the following: \(\dfrac{18}{1\text{ hour }30\text{ mins}}\) \(\dfrac{18}{1.3(0)}\) 13·84(61…) (from 18 ÷ 1.3) \(\dfrac{18}{90}\) 18 ÷ 90 0·2 (from 18 ÷ 90) 1 mile in 5 minutes (not for 5 or 5 mph) 2 miles in 10 minutes (not for 2 or 2 mph) 3 miles in 15 minutes (not for 3 or 3 mph) 6 miles in 30 minutes (not for 6 or 6 mph)
12 (miles per hour)	A1	Mark final answer. CAO. Unsupported 12 is awarded M2 A1.