Question

A cuboidal steel box is of dimensions 50 cm by 60 cm by 70 cm. Find the cost of the steel
required for making 20 such boxes if 1 mof a steel sheet costs 60.​

Answer 1

Answer:

Step-So, the total surface area of the cuboid =50cm=2(40×30+30×50+40×50)

=2(1200+1500+2000)=9400cm  

2

 

Total surface area of 20 boxes =20×9400cm  

2

=188000cm  

2

=18.8m  

2

 

Total cost =Rs45×18.8m  

2

=Rs846

PLZ MARK ME BRAINLIEST

Answer 2

Answer:

2568

Step-by-step explanation:

TSA=2 (Ib+bh+hl)

=2 (50×60+60×70+70×50)

= 21,400cmsq.

TSA of 1 box =21400 cmsq

than 20 such box =21400cmsq×20

= 428000cmsq.

since cost is given in m so change total surface area in m =428000cmsq÷ 10000

= 42.8msq

cost of 1msq is 60rupees

than cost of 42.8msq =42.8×60

=2568 rupees.

THANKU

PLEASE FOLLOW,ME AND LIKE