Question

7 ) The area of rectangular field is 3125 m square and its breadth is 25 m. A boy runs around the field at the rate of 5km/h . How much time will it take to go 10 time around it?​

Answer 1

Answer:

• It will take 36 minutes to go 10 times around the rectangular field.

Step-by-step explanation:

Given that:

• The area of rectangular field is 3125 m square and its breadth is 25 m.
• A boy runs around the field at the rate of 5km/h.

To Find:

• How much time will it take to go 10 times around it?

Formula used:

• Area of a rectangle = Length × Breadth
• Perimeter of a rectangle = 2(Length + Breadth)

Finding the length of the rectangular field:

⟿ 3125 = Length × 25

⟿ Length = 3125/25

⟿ Length = 125

∴ Length of the rectangular field = 125 m

Finding the perimeter of the rectangular field:

⟿ Peimeter = 2(125 + 25)

⟿ Peimeter = 2 × 150

⟿ Peimeter = 300

∴ Perimeter of the rectangular field = 300 m

Finding the length of 10 rounds of rectangular field:

• 10 rounds = 10 × 300
• 10 rounds = 3000

∴ The length of 10 rounds of rectangular field = 3000 m

Converting the length of 10 rounds into km:

• 1000 m = 1 km
• 3000 m = 3000/1000 = 3 km

Finding the time taken to go 10 times around it:

We know that.

• Time = Distance/Speed

We have.

• Distance = 3 km
• Speed = 5 km/h

• Time = 3/5 h
• Time = 0.6 h

Converting the time into minutes:

• 1 h = 60 minutes
• 0.6 h = 60 × 0.6 = 36 minutes

∴ The time taken to go 10 times around it = 36 minutes

Answer 2

Answer:

Given :-

Area = 3125 m²

Breadth = 25 m

Speed = 5 km/h

To Find :-

time will it take to go 10 time around it?

Solution :-

After first we need to find its length

Length = Area/Breadth

Length = 3125/25

Length = 125 m

Now

Finding perimeter

Perimeter = 2(l + b)

Perimeter = 2(125 + 25)

Perimeter = 2(150)

Perimeter = 300 m

For 10 rounds

Distance = 300 × 10/1000 = 3 km

According to the question

Time = Distance/Speed

Time = 3/5

Time = 0.6 hrs