Question

the cost of carpeting the floor of a room 15m long at the rate of Rs. 60 per square metre is Rs. 10800 the cost of painting the wall at the rate Rs. 2 per square metre is Rs. 2160 find the height of the room

Answer 1

Find the area of the floor:

1 m² = Rs 60 and the carpeting cost Rs 10800

Area = 10800 ÷ 60 = 180m²

Find the width:

Given that the length = 15 m

Width = Area ÷ Length

Width = 180 ÷ 15 = 12 m

Find the perimeter:

Perimeter = 2 (Length + Width)

Perimeter = 2(15 + 12) = 54 m²

Find the area of the walls:

Cost of 1 m² = Rs 2, Total cost = Rs 2160

Area = 2160 ÷ 2 = 1080 m²

Find the height:

Height = Area ÷ Perimeter

Height = 1080 ÷ 54 = 20 m

Answer: The height is 20 m

Answer 2

here is your answer OK

here the area of carpet= area of room. ,area of room=l*0.75m^2
area of room=15*bm^2. let breadth=bm.
length of carpet=totalcost of carpenting/cost per meter
hence length of carpet=3600/30=120m.
hence 15*b=120*0.75.b=6m.