Answer :

Given,

Dimensions of the log

Length (L) = 8m = 800 cm

Breadth (B) = 5m = 500 cm

Height (H) = 80 cm

Dimensions of block

Edge (a) =20 cm

The volume of log = L × B × H

= 800 × 500 × 80

= 32000000 cm^{3}

Volume of block = a^{3}

= 20^{3}

= 8000 cm^{3}

Number of block can be cut from log

= 4000

So, 4000 blocks can be cut from log

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