Question

find the cost of making the envelope.

please give relevant answers and if you don't know then no need to answer
agar kiya toh report kaar dongi uss irrelevant answer ko​

Answer 1

Step-by-step explanation:

First let us find the area of the rectangle.

Area of rect.=l*b

=80cmsq.

Now let us find the area of lid which is in the shape of triangle.

We know, area of triangle ⛛ =1/2*b*h

Given, base=10 cm

Height=8-4=4

Area =1/2*10*4

=20cmsq.

Now adding the area =80+20=100cmsq.

As there will be two rectangle in the front and back, so =2*100=200cmsq.

Now, 200cm=2m

So the cost =2*5=₹10

Answer 2

Answer:

1 rupees is the answer bro

Step-by-step explanation:

area of rectangle for 2 sides front and back plus the the area of 2 Triangle x rate of paper

area of rectangle = 0.1 x 0.08 = 0.008m^2

area of traingle

= 1/2 x 0.1 x 0.04 = 0.002m^2

Total Area of Envelope

= 2 x area of rectangle + 2 area of traingle

= 2x 0.008 + 2 x 0.002

= 0.016 + 0.004

= 0.02 sqm^2

rate = 50 x 0.02 = 1 rupees