Question

three metal cubes with edhes 6 cm 8 cm 10 cm respectively are melt together and formed single cube find volume,surface area,diogonal of cube

Answer 1

hey dude .....
ur answer is here........!!!!!!!!

volume remains same so 
volume of new cube = v1+v2+v3
= 6^3+8^3+10^3
=216+512+1000
=1728
now volume of new cube = a^3= 1728cm³

edge of new cube = a= cube root of 1728cm³

a= 12cm

so ...
(1). volume =a^3=1728cm³.....

(2). therefore surface area of new cube = 6 a^2
=6×12^2
=6×12×12
=864 square cm.

(3). diagonal=root 3^a=20.785 cm..

thanks ....!