Question

find the length of a diagonal of a cuboid with the length is equal to 10 cm is equal to 8 cm and height is equal to 4 cm​

Answer 1

$diagonal of cuboid= \sqrt({l {}^{2} } +b {}^{2} + h {)}^{2}$
=√[10^2+8^2+4^2]
=√(100+64+16)
=√100+80
=√180
=√(4)(5)(9)
=(√5)(2)(9)
18√5cms is the answer