Question 484292
Let weight of empty lorry : W Kg

Since bricks weigh 3 times as heavy as the empty lorry, therefore weight of bricks : 3W Kg

Total weight (bricks+lorry) = 3W+W = 4W
4W = 11600Kg
W = 11600/4 = 2900 Kg

Ans : Weight of the bricks = 3W = 3*2900 = 8700Kg