INTERNAL & external!!!

Geometry Level pending

An open rectangular cistern when measured from outside is 1.35 m long , 1.08 m broad and 90 cm deep , and is made of iron which is 2.5 cm thick . Find the capacity of the cistern and the volume of iron used .

NOTE : If the capacity is a ; and the volume of iron is b ; then the answer should be like a.b that is in decimal format

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