Question

3. A room is 150 m long and 25 m wide. If its height is 6 m, find the cost of white washing its four walls and roof
at the rate of 20 per m ". Also, find the cost of polishing its floor at the rate of 40 per m2.
4. A chocolate box has dimensions 5 myan​

Answer 1

Answer:

Step-by-step explanation:

length (l) = 150m

breadth(b) = 25m

height (h) = 6m

area to be white washed =2(l+b)h + lb

2(150+25)6+(150*25)

=2(175)6+3750

=350*6 + 3750

=2100 + 3750

=5850m^2

total cost = 5850*20

             =117000 rs

area of floor =150*25

                     =3750m^2

total cost for polishing = 3750*40

                                    =150000rs

i hope you understand!!

all the best!

Answer 2

Step-by-step explanation:

Length - 150 m

Breath- 25 m

Height- 6 m

Area of four walls 2(l+b)h+(lb)

2 (150+25)6+(150*25)

2(175)*6+3750

2100 + 3750= 5850

The rate of per m square= 20 rupees

5850*20

117000

Area of room polishing = l*b

Length - 150

Breadth - 25

150*25

3750

The rate of polishing it's floor - 40 rupees

3750*40

150000