Question

What is the surface area of the box, when one end of a cuboid is open?
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Answer 1

Answer:

There are several methods of doing this question .

But the easiest one is given below:-

First find Total Surface Area of whole cuboid which is ,

Given,

Length (l) = 5cm

Breadth (b) = 5cm

Height (h) = 5cm

TSA of cuboid = 2(l*b+b*h+h*l)

= 2(5*5+5*5+5*5)

= 2(25+25+25)

= 2(75)

= 150 sq cm

Now , we know that box is open from top so we have to subtract Area of rectangle from TSA .

Area of rectangle = l*b

= 5*5

= 25 sq cm

Now,

The surface area of open cuboidal box

= TSA of cuboidal box - Area of rectangle

= 150 - 25

= 125 sq cm

Hence,

Answer - 125 sq cm

Step-by-step explanation:

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