One of the important question for the board exam class 10 from
mensuration chapter.This question is from r d sharma class 10 maths.
chapter-16.2 question number-16 maths r d sharma,mensuration.
In this question we have to find the mass of the road roller, if 1 cm3
of the iron has 7.8 gm mass.A cylindrical road roller made of iron is
1 m long. Its internal diameter is 54 cm and the thickness of the iron
sheet used in making roller is 9 cm.