Math, asked by kashish526, 3 months ago

A room is l6m long, 8.5m broad and 4.5 m high. It has two doors , each of dimensions 2.5m by 1.5m and three windows , each of dimensions 1.2m by 65cm . The cost of painting the walls of the room from inside at the rate of 90 paise per m² is​

Answers

Answered by amitnrw
1

Given :  A room is l6m long, 8.5m broad and 4.5 m high

It has two doors , each of dimensions 2.5m by 1.5m and three windows , each of dimensions 1.2m by 65cm .

To Find : The cost of painting the walls of the room from inside at the rate of 90 paise per m² is​

Solution:

Area of 4 walls  = 2 ( 16 + 8.5 ) * 4.5

= 9 (24.5)

= 220.5  m²

two doors , each of dimensions 2.5m by 1.5m

Area = 2 x 2.5 x 1.5 = 7.5  m²

65cm = 0.65 m

three windows , each of dimensions 1.2m by 65cm

Area = 3 x 1.2 x 0.65 =  2.34 m²

Area of walls to be painted = 220.5 - 7.5 -  2.34 = 210.66 m²

Rate of  cost of painting = 90 paise / m² = 0.9 Rs / m²  

cost of painting = = 0.9 x  210.66  =  189.594 Rs

≈ Rs 189.6

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Answered by onlyforgames2303
1

Answer:

Given :  A room is l6m long, 8.5m broad and 4.5 m high

It has two doors , each of dimensions 2.5m by 1.5m and three windows , each of dimensions 1.2m by 65cm .

To Find : The cost of painting the walls of the room from inside at the rate of 90 paise per m² is

Solution:

Area of 4 walls  = 2 ( 16 + 8.5 ) * 4.5

= 9 (24.5)

= 220.5  m²

two doors , each of dimensions 2.5m by 1.5m

Area = 2 x 2.5 x 1.5 = 7.5  m²

65cm = 0.65 m

three windows , each of dimensions 1.2m by 65cm

3 x 1.2 x 0.65 =  2.34 m²

= 220.5 - 7.5 -  2.34 = 210.66 m²

= 90 paise / m² = 0.9 Rs / m²  

= 0.9 x  210.66  =  189.594 Rs

≈ Rs 189.6

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