Orla has an eReader - Junior Cycle Mathematics - Question 4 - 2016
Question 4
Orla has an eReader.
The front of the eReader is in the shape of a rectangle measuring 11 cm by 16 cm.
It has a rectangular screen measuring 9 cm by 14 cm.
(a) Work... show full transcript
Worked Solution & Example Answer:Orla has an eReader - Junior Cycle Mathematics - Question 4 - 2016
Step 1
Work out the area of the screen of Orla's eReader.
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Answer
To calculate the area of the screen, use the formula for the area of a rectangle:
extArea=extlengthimesextwidth
Substituting the values for the screen:
extArea=9extcmimes14extcm=126extcm2
Thus, the area of the screen is 126 cm².
Step 2
Is Orla correct? Justify your answer fully.
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Answer
To determine if the screen covers more than 80% of the area of the front of the eReader, we first need the area of the front: