Foundation November 2017 Paper 2 Q8

OCRFoundationCurrent spec4 marksSolving Simple EquationsSubstitution

8 This is a rule to find the time, in minutes, needed to roast lamb.

Function machine: weight, in pounds, then multiply by 30, then add 20, gives time, in minutes
(a) Use the rule to work out the time needed to roast a piece of lamb which weighs 4 pounds. [2]
(b) A different piece of lamb takes 95 minutes to roast.

Use the rule to work out the weight of this piece of lamb. [2]

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