6.
Volume of a cube is 1,000 cm'. Find its total surface area.
x 30 m.
7. How many planks each of which is 2 m long, 2.5 cm broad and 4 cm thick can be
cut off from a wooden block 6 m long, 15 cm broad and 40 cm thick?
8.
Three solid metal cubes with edges 6 cm, 8 cm and 10 cm respectively are melted
together and formed into a single cube. Find the volume of new cube.
9. Find the volume of a cube whose surface area is 150 m2.
10. Find the volume of a cube, one face of which has an area of 81 m2.
Answers
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1
Q. 6
Given,
volume of cube=1000cm^3
total surface area of cube =?
so,
volume of cube=length^3
1000=l^3
l=10cm
total surface area of cube=6l^2
=6(10)^2
=600cm^2
I hope this answer help you
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