Question

Mr. Chowdhury rounds four times around his rectangular garden for his morning walk. His garden's length is twice than its breadth and the length of the garden is 120 meter. How many kilometers he walks for morning walk?​

Answer 1

Answer :

1.44 km

Step-by-step explanation :

 $\setlength{\unitlength}{1 cm}\begin{picture}(0,0)\thicklines\multiput(0,0)(5,0){2}{\line(0,1){3}}\multiput(0,0)(0,3){2}{\line(1,0){5}}\multiput(2.1,-0.7)(0,4.2){2}{\sf\large 120 m}\multiput(-1.4,1.4)(6.8,0){2}{\sf\large 60 m}\put(-0.5,-0.4){\bf A}\put(-0.5,3.2){\bf D}\put(5.3,-0.4){\bf B}\put(5.3,3.2){\bf C}\end{picture}$

Given,

The length of the rectangular garden = 120 m

Since, the length is twice than the breadth.

          length = 2(breadth)

           120 m = 2(breadth)

           breadth = 120/2

           breadth = 60 m

∴ The breadth of the garden = 60 m

⇒ The distance Mr.Chowdhary walks for one turn round the rectangular garden is equal to Perimeter of the rectangular garden.

we know,

Perimeter of the rectangle = 2(length + breadth)

                                              = 2(120 m + 60 m)

                                              = 2(180 m)

                                              = 360 m

∴ The distance he walks for one turn = 360 m

Mr. Chowdhury rounds four times around his rectangular garden for his morning walk.

So,

  The distance he walks for morning walk will be equal to 4 times the perimeter of the garden.

             = 4 (360 m)

             = 1440 m

Conversion :

 1 km = 1000 m

⇒ 1 m = 1/1000 km

∴ 1440 m

     $\bf =\frac{1440}{1000} \ km \\\\\ =1.44 \ km$

Mr.Chowdhary walks 1.44 km for morning walk.