Question

a room is 7m long and 5 wide. how many children can sit on its floor if each child requires 7 cm x 50 cm floor area​

Answer 1

Answer:

10 children

Step-by-step explanation:

area of the room= l x b

                           = 7m x 5m

                           =35m

area of the floor which a student requires= l x b

                                                                     = 7cm x 50cm

                                                                     =350cm

no. of children in a room = area of the room/area of the floor which a student requires

                                         =35m/350cm

                                         =35m/3.5m

                                         =10 children

Answer 2

Answer:

• 10 students can sit in the room floor.

Step-by-step explanation:

Question says that, area of a room is 7m × 5m. how many children can sit on the floor if each child requires area of 7cm × 50cm.

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Step 1 :

Finding the area of the floor :

• The floor is rectangle-shaped.

Area of a rectangle : l × b

• l (length) = 7 metres.
• b (breadth) = 5 metres.

So,

→ Area of the floor = 7 · 5

→ 35 m²

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Step 2 :

Finding the required area for children :

Each child requires floor of :

→ 7cm · 50cm

→ 350cm² or, 3.5 m²

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Step 3 :

Finding the number of children can sit on the floor :

Number of children can sit is given by :

→ $\sf \frac{A_1}{A_2}$

Here,

• $\sf {A}_{1}$ is the area of the room.
• $\sf {A}_{2}$ is the area required for each children.

So,

Number of children can sit :

→ $\sf \frac{35}{3.5}$

→ $\sf \frac{35 \times 10}{35}$

→ 10 children.

∴ 10 children can sit in the room floor.

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Note behind :

• For calculation of number of children can sit in the floor we need to convert the units of the area in same unit. As we've converted it into metre²

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