Question

Feeding the birds is always a pleasing task. To give water to free birds, Amar planned to make a bird water feeder to be kept in his balcony. He made a rectangular open box for this purpose having dimensions40cm x 30cm x 20cm. Based on the above information answer the following questions
i)
What is the volume of that the container can hold?


ii)
Calculate the surface area of container to be painted


iii)
How many number of boxes of dimension8cm x 6cm x

5cm, that can be kept inside the box?


iv)
Express the capacity of container in liters​

Answer 1

Answer:

1)24000 cm cube

2)2800 cm square

3)100 boxes

4)24 liters

Step-by-step explanation:

L = 40cm

B = 30cm

H = 20 cm

1) v = l x b x h

v = 40 x 30 x 20

= 1200 x 20

= 24000 cm cube

2) LSA = 2h(l+b)

= 2 x 20 (40 + 30)

= 40(70)

= 2800 cm square

3) v = l x b x h

v = 6 x 8 x 5

= 48 x 5

= 240 cm

= 24000 ÷ 240

= 100 boxes

4) 1 Liters = 1000 cm cube

24000 ÷ 1000

= 24

= 24 liters

Answer 2

Given:

L = 40cm

B = 30cm

H = 20 cm

To Find:

i) What is the volume of that the container can hold ?

ii) Calculate the surface area of container to be painted.

iii) How many number of boxes of dimension 8cm x 6cm x 5cm, that can be kept inside the box?

iv) Express the capacity of container in liters​

Solution:

1) We know that,

  v = l x b x h

  v = 40 x 30 x 20

     = 1200 x 20

     = 24000 $cm^{3}$

2)We know that,

   LSA = 2h (l+b)

           = 2 x 20(40 + 30)

           = 40 (70)

           = 2800 $cm^{2}$

3) We know that,

    v = l x b x h

    v = 6 x 8 x 5

       = 48 x 5

       = 240 cm

   So, Number of boxes that can be kept inside = 24000 ÷ 240

                                                                                = 100 boxes

4) We know that,

    1 Liter = 1000 $cm^{3}$

  So, Multiplying both sides by 24, we get

    24 Liters = 24000 $cm^{3}$

Hence, (i) the container can hold 24000 $cm^{3}$, (ii) the surface area of the container to be painted is 2800 $cm^{2}$, (iii) 100 boxes of dimension 8cm x 6cm x 5cm, that can be kept inside the box, and (iv) capacity of container in liters​ is 24 liters.