How many bricks are required to construct a wall 190 cm long, 90 cm high and 9 cm wide?
Note: The measurement of a brick is 19 cm × 9 cm × 9 cm.

The correct option is C 10
Measurement of a brick:
19 cm × 9 cm × 9 cm

The length of the wall = 190 cm
The length of each brick = 19 cm
Number of bricks required lengthwise
= 190 ÷ 19 = 10

The height of the wall = 90 cm
The height of each brick = 9 cm
Number of bricks required heightwise
= 90 ÷ 9 = 10

The breadth of the wall = 9 cm
The breadth of each brick = 9 cm
Number of bricks required breadthwise
= 9 ÷ 9 = 1

So, the total number of bricks required
= 10 × 10 × 1 = 100