Shalini has to cut out circles of diameter 
cm from an aluminum strip of dimensions 
cm by 
cm. How many full circles can Shalini cut? Also calculate the wastage of the aluminum strip.
Diameter of circle = 
cm
Length of aluminium strip = 
cm
Width of aluminium strip = 
cm
Number of circles that can be cut = Length of aluminium strip/Diameter of circle = 
= 7
Area of aluminium strip = Length 
Width
cm2
Area of circle = 
Wastage of aluminum strip = 
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and 
m high. If a new roller coaster is built that is 
times the height of the existing coaster, what will be the height of the new roller coaster?
