how many bricks of length 25cm, breadth 15cm, and height 10cm are required to build a wall of length 6cm, height 2.5cm and breadth 0.5cm?
Answers
Answer:
Step-by-step explanation:
length of brick = 25cm
breadth of brick = 15 cm
height of brick = 10cm
volume of brick = length × breadth × height
= 25 cm × 15 cm × 10cm
= 3750 cm³
length of wall = 6m = 600 cm
breadth of wall = 0.5 m = 50cm
height of wall = 2.5 m = 250 cm
volume of wall = length × breadth × height
= 600 × 250 × 50 = 7500000 cm³
= 7500000/3750
= 750000/375
= 2000
hence, number of bricks = 2000
Step-by-step explanation:
Answer:
Step-by-step explanation:
Diameter of the metallic sphere = 9 cm
Radius of the metallic sphere , r = 9/2 cm = 4.5 cm
Volume of the metallic sphere = 4/3 × πr³
Diameter of the cylindrical wire = 2 mm = 2/10 cm = 0.2 cm
Radius of the cylindrical wire , r1 = 0.2/2 cm = 0.1 cm
Let the height of the cylindrical wire = h cm
Volume of the cylindrical wire = πr1²×h
Volume of the metallic sphere = Volume of the cylindrical wire
4/3 × πr³ = πr1²×h
4/3 × π × 4.5³ = π(0.1)²×h
4/3 × 4.5 × 4.5 × 4.5 = 0.01h
4 × 1.5 × 4.5 × 4.5 = 0.01 × h
h = (4 × 1.5 × 4.5 × 4.5)/0.01
h = 121.5/0.01 = 121.5 × 100 = 12150 cm
h = 12150 cm
Hence, the required length of the wire is 12150 cm.
Answer:
Step-by-step explanation:
length of brick = 25cm
breadth of brick = 15 cm
height of brick = 10cm
volume of brick = length × breadth × height
= 25 cm × 15 cm × 10cm
= 3750 cm³
length of wall = 6m = 600 cm
breadth of wall = 0.5 m = 50cm
height of wall = 2.5 m = 250 cm
volume of wall = length × breadth × height
= 600 × 250 × 50 = 7500000 cm³
= 7500000/3750
= 750000/375
= 2000
hence, number of bricks = 2000