Question

the length of a rectangular field is 10m more than it's breadth. if its length is 50m, the find the time a boy takes to make two round of the field, if his speed is 1.5m per second. the answer in my book is 4 minutes

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Answer 1

Answer:

See the attachment, hi hasini my 2nd account

Step-by-step explanation:

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Answer 2

Answer:

Time taken by the boy is 4 minutes

Step-by-step explanation:

Given :-

• The length of rectangular field = 50m

• The speed of the boy = 1.5m/s

To Find :-

• Time taken by the boy around the field = ?

Solution :-

As per the question the length of field is 10m more than breadth so, it means the breadth of field is 10m less then it's length

So,

⇢Breadth of field = 10m less then it's length

⇢Breadth of field = 50 - 10 = 40m

Now calculate distance covered by boy :-

⇢ Distance = 2{Perimeter of filed}

⇢ Distance = 2{2(Length + breadth)}

⇢ Distance = 2{2(50 + 40)}

⇢ Distance = 2{2 × 90}

⇢ Distance = 2 × 180

⇢ Distance = 360m

Now calculate time taken by the boy :-

Here , Distance = 360m. Speed = 1.5m/s :-

$\underbrace{\boxed{\bold{Time=\frac{Distance}{Speed}}}}$

⇢ Time = 360/1.5

⇢ Time = 240 sec

⇢ Time = 240 / 60 = 4 minutes

Therefore, Time taken by the boy is 4 minutes