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21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)
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Q10 of 77 Page 22

Find the weight of solid rectangular iron piece of size 50 cm×40cm × 10 cm, if 1 cm3 of iron weights 8 gm.

Given,


Dimension of rectangular iron piece = 50cm×40cm×10cm


Volume of solid rectangular =


Weight of 1 cm3 iron = 8 gm


∴ weight of 20000 cm3 iron =


More from this chapter

All 77 →
8

What will happen to the volume of a cuboid if its :

(i) Length is doubled, height is same and breadth is halved?


(ii) Length is doubled, height is doubled and breadth is same?

9

Three cuboids of dimemsions 5 cm × 6cm × 7cm, 4cm × 7cm × 8cm and 2 cm×3 cm× 13 cm are melted and a cube is made. Find the side of cube.

11

How many wooden cubical blocks of side 25 cm can be cut from a log of wood of size 3 m by 75 cm by 50 cm, assuming that there is no wastage?

12

A cuboidal block of silver is 9 cm long, 4 cm broad and 3.5 cm in height. From it, beads of volume 1.5 cm3 each are to be made. Find the number of beads that can be made from the block.

Questions · 77
21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)
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