The Volume of a cuboid is 84cm^3 with the height of 7cm. The least possible length of the diagonal of the base of cuboid is

Question

anonymous · Answer

(A)$$\sqrt{23}$$ (B)$$\sqrt{24}$$ (C)$$\sqrt{25}$$ (D)$$\sqrt{144}$$

anonymous · Answer

wat?

anonymous · Answer

ia min class 9 i don't understand this

raden · Answer

assume the base of cuboid is a square with length is x, so we have
x^2*7=84
x^2 = 84/7=12
x=sqrt(12)
now, to find the diagonal of base, u can use the formula: sqrt(2) * side base
= sqrt(2) * sqrt(12)
= ....

anonymous · Answer

$$\sqrt{24}$$

raden · Answer

right

anonymous · Answer

just 1 question didn't understand ur 
now, to find the diagonal of base, u can use the formula: sqrt(2) * side base part

anonymous · Answer

i think i understood
is this diagonal of a square formulae?

raden · Answer

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