JIPMAT 2022 (QA) PYQs

If each side of a cube is decreased by $19 \%$, then the decrease in surface area is :

One cubic metre of iron weighs 7.800 kg. The weight of iron in a pipe of length 4 m, whose interior and exterior diameters measure 10 cm and 12 cm respectively, is nearly

The radii of two cones are in the ratio 2:3 and their volumes are in the ratio 1:3. Then the ratio of their heights is: