Question

A plastic box 1.5m long and 1.25m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine (i) the area of the sheet required for making the box. (ii) the cost of sheet measuring 1m² cost rs 20

Answer 1

Answer:

Step-by-step explanation:

i)area of the sheet required for making the box = length of box x breadth of

                                                                                  box x height of box

                                                                                1.5m x 1.25m x 65cm

                     first convert m into cm = 150cm x 125cm x 65cm

                                                            =1218750cm2 / 12187.5m2

ii) if cost of sheet measuring 1m2 = rs.20

then 12187.5m2 x 20 = cost of sheet

        =rs.243750

hope this helps                        

Answer 2

Question :-

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine

(i) The area of the sheet required for making the box.

(ii) The cost of sheet for it, if a sheet measuring 1m2 costs ₹20.

Answer :-

(i) Here, length (l) = 1.5 m, bread th(b) = 1 .25 m

and height (h) = 65 cm = 65/100 m = 0.65 m

∵ It is open from the top.

∴ Its surface area

= [Lateral surface area] + [Base area]

= [2(1 + b)h] + [lb]

= [2(1.50 + 1.25)0.65] m2 + [1.50 x 1.25] m2

= [2 x 2.75 x 0.65] m2 + [1.875] m2

= 3.575 m2+ 1.875 m2 = 5.45 m2

∴ Area of the sheet required for making the box = 5.45 m2

(ii) Cost of 1 m2 sheet = Rs. 20

Cost of 5.45 m2 sheet = Rs. (20 x 5.45)

= Rs. 109

Hence, cost of the required sheet = Rs. 109

Plz mrk as brainliest ❤