A wall 18 m long, 10 m high and 40 cm wide is to be constructed using bricks of dimensions 30 cm, 15 cm and 10 cm. How many bricks (in thousands) will be required?

 Confusion Points
 1.You have to read the question carefully...
2.In this question the unit(thousands) of amount is already mentioned.Question wants  to answer in only amount number . so the answer will be 16 and not 16000.

Note - This is the official Question of SSC and SSC Consider 16 is the correct Answer.

Given:

Wall dimensions = 18m × 10m × 40 cm

Brick dimensions = 30 cm × 15 cm × 10 cm

Concept used:

The volume of a cuboid = Length × Breadth × Height

The volume of the wall should be equal to the volume of the total bricks required.

Calculation:

18 m = 1800 cm

10 m = 1000 cm

Volume of the wall = (1800 × 1000 × 40) cm³

Volume of each brick = (30 × 15 × 10) cm³

Now, the number of bricks required = (1800 × 1000 × 40) ÷ (30 × 15 × 10)

⇒ 16000

∴ The number of required bricks is 16 thousand.

 Confusion Points 1.You have to read the question carefully...
2.In this question the unit(thousands) of amount is already mentioned.Question wants  to answer in only amount number . so the answer will be 16 and not 16000.