A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height. How many bricks will be used to make a wall of length 15 cm, breadth 10 cm and height 8 cm 1. 2 bricks
2. 5 bricks
3. 9bricks
4. 4bricks

2bricks

Step-by-step explanation:

volume of cuboid = length × breadth ×height

step 1 : calculate the first one

v= 15cm ×8cm× 5cm = 1200cm^3

step 2 calculate the 2nd one

v= 15cm ×10cm×8cm = 600cm^3

number of bricks

1200cm^3 × 1bricks/ 600cm^3 = 2 bricks

We can solve this problem by the rule of three:
1.5 page of Aileen1 page of her friend
x20 pages of her friend

x=(1.5 page of Aileen * 20 pages of her friend) / 1 page of her friend=
=30 pages.

Therefore: Aileen´s mom is not correct, Aileen can read 30 pages if her friend read 20 pages.