Question

A box which measure 70 cm*36 cm*12 cm is to be covered with canvas. how many meters of canvas of width 80 cm would be required to cover 150 such boxes? PLZ I HAVE EXAM PLZ ANSWER

Answer 1

Given length of the box = 70cm.

Given breadth of the box = 36cm.

Given height of the box = 12cm.

We know that Total Surface area = 2(lb + bh + lh)

                                                        = 2(70 * 36 + 36 * 12 + 12 * 70)

                                                        = 7584.


Given Width = 80cm.

Length of the canvas = 7584/80

                                    = 94.8cm.


Therefore the required length = 94.8 * 150

                                                   = 14220m.


Hope this helps!

Answer 2

hey friend,
I am meritkshitij here.
--------->>>>>>>>>----------
given,length of box = 70 cm

breadth = 36 cm

and,height = 12 cm.

total surface area of box =T.S.A of cuboid

i.e. 2(lb + bh + hl )

= 2 ( 70 × 36 + 36 × 12 + 12 × 70 )

= 2 (2520 + 432 + 840 )

=2 ( 3792 )

= 7584 cm²

area of 150 such boxes = 7584 × 150 cm²

area of canvas = area of 150 such boxes

=> length × width. = 7584 × 150 cm²

=> l × 80 cm = 7584 × 150 cm²

=> l = 7584 × 150/80 m

=>l =14420 cm Ans.

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Thanks