19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Question
Answer ASAP
19 Four discs, each of radius 1 cm, are cut from
a 5 cm by 5 cm cardboard square. Use the
value 3.14 for a to find the area of cardboard
left over.
20 One litre of water is poured into a
rectangular container. Find the height that
the water will rise if the area of the base of
the container is 80 cm2.
Transcribed Image Text:19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over. 20 One litre of water is poured into a rectangular container. Find the height that the water will rise if the area of the base of the container is 80 cm2.
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