A room is $7 m$ long and $5 m$ broad and it has a door measuring $2 m$ by $1.5 m$ and two windows each measuring $1.5 m$ by $1 m$ . The cost of painting the walls at $R s . 12.50$ per sq.m is $R s . 825$ . Find the height of the room.

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A room 5 m long, 4.5 m wide and 3.6 m high has one door 1.5 m by 2.4 m and two windows, each 1 m by 0.75 m, then the cost of painting its roof at the rate of Rs 9 per m2 is Rs 202.50If true then enter 1 else 0

The roof will have the same dimensions as the floor which are the length and breadth as given in the question. Hence, areaof the roof =5×4.5=22.5m2Cost of painting the roof at the rate of Rs 9 per m2=9×22.5= Rs 202.5

A room $5$ m long, $4.5$ m wide and $3.6$ m high has one door $1.5$ m by $2.4$ m and two windows, each $1$ m by $0.75$ m, then the cost of painting its roof at the rate of Rs 9 per $m^{2}$ is Rs 202.50

If true then enter $1$ else 0

The roof will have the same dimensions as the floor which are the length and breadth as given in the question.
Hence, area
of the roof $= 5 \times 4.5 = 22.5 m^{2}$
Cost of painting the roof at the rate of Rs $9$ per $m^{2} = 9 \times 22.5 =$ Rs $202.5$