a. the area of cross section
b. the volume of 63cm long pipe
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Step-by-step explanation:
area of c/s= π/4 *10*10 -π/4*(10-2) (10-2)
= 28.274 sq cm
for unit(1cm) height volume = 28.275 *1
= 28.275cu cm
therefore,for 63 cm height volume of clyinder=
= 28.275*63
=1782 cu cm
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