# How many bricks, each of dimensions 25 cm x 16 cm x 10 cm will be

How many bricks, each of dimensions 25 cm x 16 cm x 10 cm will be needed to build a wall 24 m long, 6m high and 0.4 m thick

(a) 14440

(b) 14000

(c) 15440

(d) 15000

**Answer: (a) 14400**

**Solution:-**

The dimensions of a brick = 25 cm, 16 cm and 10 cm

Then, the volume of a brick = 25 x 16 x 10

= 4000 cm^3

The dimensions of a wall = 24 m, 6 m and 0.4 m

Then, volume of the wall = 24 x 6 x 0.4

= 57.6 m^3

= 57600000 cm^3

So, the number of bricks to built the wall = 57600000/4000

= 14400

Hence, the correct answer is option (a) 14400.