A rectangular-based pyramid is cut horizontally, leaving the frustum and the pyramid shown below. Work out the volume of the fru
stum. Give your answer in cm", and give any decimal answers to 1 d.p. 
1 answer:
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Answer:
third one is a required answer.
x =2y
or
1/x=y
Answer:
x= 30/7
Step-by-step explanation:
See image below:)
