Question

Q11. The area of a trapezium is 1440 cmIf the lengths of its parallel sides are 54.6 cm and
35.4 cm, find the distance between them.

Q12. Calculate the height of a cuboid which has a pase 9area of 180 cm' and volume is 900
cm

13. A cuboidal box of dimensions I mx 2 m 1.5 m is to be painted except its bottom
Calculate how much area of the box has to be painted.

014. In a trapezium, the parallel sides measure 40 cm and 20 cm. Calculate the area of the
trapezium if its non parallel sides are equal having the lengths of 26 cm

15. Two cubes are joined end to end. Find the volume of the resulting cuboid, if each side
of the cubes is 6 cm.

16. How many bricks each 25 cm by 15 cm by 8 cm, are required for a wall 32 m long, 3 m
high and 40 cm thick?

17. The diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete
revolutions to move once over to level a playground. Find the area of the playground in m'.

18A rectangular metal sheet of length 44 cm and breadth 11 cm is folded along its length
to form a cylinder. Find its volume.

answer all pls ​

Answer 1

Radius of the roller (r)=

2

84

cm=42cm

length of the roller (h)=120cm

∴ Area of the playground levelled in taking 1 complete revolution 2πrh

=2×227×42×120=31680cm

2

∴ Area of the playground

=31680×500=15840000cm

2

100×100

15840000

m

2

=1584m

2