Question

Mensuration
e) The cost of plastering the floor of a room, which is 10 m long, at Rs 18.50 pr sq. metre
is Rs 1480. If the cost of painting its walls at Rs 12.50 per sq. metre is Rs 2700, find
the height of the room.
7. a) A room is twice as long as it is broad and its height is 4.5 m. If the cost of papering its
walls at Rs 15 per sq. metre is Rs 2430, find the cost of paving marbles on its floor at
Rs 150 per sq. metre.
b) A room is three times as long as it is broad and its height is 4.6 m. If the cost of
carpeting its floor at Rs 60 per sq. metre is Rs 4500, find the cost of colouring the walls
at Rs 18 per sq. metre.
c) The length of a hall is two times its breadth and the breadth is two times its height.
If the cost of papering its walls at Rs 25 per sq. metre is Rs 10,800, find the cost of
paving marbles on its floor at Rs 250 per sq. metre.
d) The length of a room is twice its breadth and thrice its height. If the cost of carpeting
the floor at Rs 80 per sq. metre is Rs 9000, find the cost of plastering its walls and
ceiling at Rs 35 per sq. metre.​

Answer 1

Answer:

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Step-by-step explanation:

Mensuration

e) The cost of plastering the floor of a room, which is 10 m long, at Rs 18.50 pr sq. metre

is Rs 1480. If the cost of painting its walls at Rs 12.50 per sq. metre is Rs 2700, find

the height of the room.

7. a) A room is twice as long as it is broad and its height is 4.5 m. If the cost of papering its

walls at Rs 15 per sq. metre is Rs 2430, find the cost of paving marbles on its floor at

Rs 150 per sq. metre.

b) A room is three times as long as it is broad and its height is 4.6 m. If the cost of

carpeting its floor at Rs 60 per sq. metre is Rs 4500, find the cost of colouring the walls

at Rs 18 per sq. metre.

c) The length of a hall is two times its breadth and the breadth is two times its height.

If the cost of papering its walls at Rs 25 per sq. metre is Rs 10,800, find the cost of

paving marbles on its floor at Rs 250 per sq. metre.

d) The length of a room is twice its breadth and thrice its height. If the cost of carpeting

the floor at Rs 80 per sq. metre is Rs 9000, find the cost of plastering its walls and

ceiling at Rs 35 per sq. metre.