Question

In a building there are 5 rooms. Each having a equal area .The length of the room is 4m and bread ht is 5 m.The height of the rooms are 2m.If 17 bricks are needed to make a square meter then how many bricks are needed to make the floor of a particular room?

Answer 1

given the dimensions of room
L=4m
B=5m
H=2m
17 bricks need to make 1 sq. metre
area of floor=L*B
area=4m*5m=20 sq. metre
so,
no. of brick required=17*20
=340

Answer 2

1292 bricks will be needed to make the floor of one room

Step-by-step explanation:

Given:

There are 5 rooms in a building, length of one room (l)= 4m, breadth of each room(b) = 5m, the height of each room(h) =2m

17 bricks are needed to make a square meter

each room has an equal area

To find:

bricks needed to make the floor of a room

Solution:

The floor has all the dimensions in length, breadth and height form and hence we find the area for the room.

Each room's area will be equal

Area of room (A)= 2(lb +bh +lh)

Area of  room (A)= 2[(4 x 5)+ (5 x 2)+ (2 x 4)]

Area of  room (A)= 2[(20)+ (10)+ (8)]

Area of  room (A)= 2(38)

∴ Area of room (A)= 76 sq m

Now, that the area of one room is 76sq.m

to make a floor of one square meter of a room 17 bricks are needed

So, for 76sq. m of a room we will need how many bricks?

Cross multiplying the values

∴ 17 x 76= bricks needed to complete floor of one room

∴ 1292= bricks needed to complete floor of one room

Thus, 1292 bricks will be needed to make the floor of a particular room

#SPJ3