Question

A gate having dimensions 2 m X 1 m is in the wall of 3 m X 5 m. If the cost of colouring is Rs. 100 per m2 , find the total cost of colouring the wall.​

Answer 1

Answer:

Step-by-step explanation:

area of one wall =length×height=5×8=40 sq.m

Area of another adjacent wall =width×height=3×8=24 sq.m

Area of 4 walls =2×40+24×2−4.5−2.25=128−6.75=121.25

Cost of painting the four walls =121.25×25=3,031.25 Rs.

So, we don't require statement III.

hope it helps you✌

Answer 2

Answer:

length of the wall, l = 10 m = 100 cm

Breadth of the wall, b = 42 m = 4200 cm

Height of the wall, h = 5 m = 500 cm

Volume of the wall = l × b × h = 100 cm × 4200 cm × 500 cm = 21000000 cm3

Dimension of the brick = 42 cm × 12 cm × 10cm

∴ Volume of each brick = 42 cm × 12cm × 10 cm = 5040 cm3

Let the number of bricks required be n.

n × Volume of each brick = Volume of the wall

therefore, n= vol of the wall/ vol of each brick

n= 21000000cm³/5040cm³

n= 4166.67

Thus, the number of brick required is 4166.67