Question

The length of a room is double it's breadth . The cost of colouring the ceiling at Rupee 25 per sq m is Rupee 5000 and the cost of painting the four walls at Rupee 240 per sq m is Rupee 64800 . Find the height of the room .

Please tell Right answer with Solutions​

Answer 1

Answer:

4.5m

Step-by-step explanation:

Let breadth of room be     b  

, then length of room is 2b

Area of ceiling =l×b=  5000/25

⇒2b×b=200

⇒b  

2

=100

⇒b=10m

∴l=2b=2×10=20m

Area of four walls=  64800/240 =270m  

​⇒2×l×h+2bh=270

⇒2×20×h+2×10×h=270

⇒60h=270

⇒h=4.5m