Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

(i)The cost of constucting a wall 8 m long , 4m high and 20 cm thick at rate of rs 25 per m^3 is

(ii)A cube whose volume is 1/8 cubic cm is placed on top of a cube whose volume is 1 cm ^3.the 2 cubes are then placed on top of a 3rd cube whose vol is 8 cm^3.the height of stacked cubes is (iii)the number of cubes of side 3 cm that can be cut froma cuboid of dimensions 10 cm *9cm*6 cm is answer all

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

1. given l=8m, h=4m and b=20/100 = 1/5m then volume of wall = lbh = 8×4×1/5 = 32/5 = 6.2m³ given per m³ = 25 rs per 6.2m³ = 6.2×25 = 160 Rs 3. n×volume of cube= volume of cuboid n×a³=lbh n = 10×9×6/3³ = 10×9×6/27 = 20 cubes 2. we know that in cube all sides are equal .so the length of side is height given for first cube volume = 1/8cm³ i.e., a³=1/8 a = 1/2cm i.e., height of 1st cube is 1/2 cm given for second cube volume a³=1 a = 1 (a is not -1 because heights are never calculate in negative) so height of second cube is 1cm then given volume of third cube is 8 cm³ a³=8 a= 2 cm so height of third cube is 2cm then the height of resulting staked cubes is sum of the hieghts of three cubes = 1/2 + 1+2 = 1+2+4/2 (by taking lcm) = 7/2 = 3.5 cms