Question

The size of the wooden block is 5 x 10 x 20 cm .How many such blocks will be required to construct a solid wooden cube of minimum size?
A) 6
B) 8
C) 12
D) 16

Answer 1

The size of the wooden block is 5 x 10 x 20 cm .How many such blocks will be required to construct a solid wooden cube of minimum size? 

A) 6B) 8C) 12D) 16

Answer:   B) 8 

Explanation:

Side of smallest cube = L.C.M of 5, 10, 20 = 20cm  

Volume of the cube = (20 x 20 x 20)cu.cm = 8000 cu.cm  

Volume of the block= (5 x 10 x 20)cu.cm = 1000 cu.cm  

Number of blocks = (8000/1000) = 8

Answer 2

Answer:   B) 8 

✅Explanation:

Side of smallest cube = L.C.M of 5, 10, 20 = 20cm  

✅Volume of the cube = (20 x 20 x 20)cu.cm = 8000 cu.cm  

✅Volume of the block= (5 x 10 x 20)cu.cm = 1000 cu.cm  

Number of blocks = (8000/1000) = 8