Question

The cost of carpeting a room 20m long with a carpet of birth 75 cm at ₹80 per metre is ₹19200.find the width of the room.
(With a proper solution
I will mark you as brainlist)​

Answer 1

Answer:

Given:

Length=20m

Height =75cm = 0.75m

Width=?

Surface area = 2(lb+bh+hl)

==2(20×w + w×0.75 +20×0.75)

Cost per meter == 80

SA×cost per meter = Total cost

== SA ×80 = 19200

== SA= 240m²

2(20.75 w + 15) = 240

== 20.75 w = 120-15

== 20.75 w = 105

w = 5.06 ≈ 5 meters

Required width is 5 m

Answer 2

Answer:

Given :

Length = 20m

Hight=75cm = 0.75 cm

width?

surface area= 2(lb+ bh+ hl)

== 2 (20×w+ w× 0.75 + 20× 0.75

cost per meter = 80

SA× cost per meter = total cost

= sa × 80= 19200

== s = 240m²

2(2075 w+ 15) =240

==20.75w = 120- 15

== 20.75 w = 105

w=5.06 = 5 meter

required width is 5 meter

Step-by-step explanation:

hope it helps brainlist