Question

The dimensions of a rectangular tin box are 35×40×50cm.find the cost of the tin required to make 15 such boxes,if the tin costs 15 per square metres​

Answer 1

Answer:

As we know that,

Surface area of cuboid =2(lb+bh+hl)

Therefore,

Surface area of 1 tin box

=2(30×40+40×50+50×30)

=2×(1200+2000+1500)

=9400cm

2

Surface area of 20 tin box =20×9400=188000cm

2

=18.8m

2

Given that the cost of the tin sheet is R.20 per square meter.

Therefore,

Cost of tin required for 20 tin boxes =20×18.8=Rs.376

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