a room is 15m long and 12m wide. the area of four walls is Rs 405 sq.m. find the height of the room
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Area=2(12x)+2(15x)+2(15×12)
x=5÷4
x=5÷4
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Area of the 4 walls = 2×(height×length) + 2×(height ×width) ...........(1)
Given, length =15m, width=12m, height =h(say), area of the four walls=405 sq. m
Putting in equation (1),
405= 2×(h×15) +2×(h×12)
=>405=30×h +24×h
=>405= 54h
=> h= 405/54
=>h=7.5m
Given, length =15m, width=12m, height =h(say), area of the four walls=405 sq. m
Putting in equation (1),
405= 2×(h×15) +2×(h×12)
=>405=30×h +24×h
=>405= 54h
=> h= 405/54
=>h=7.5m
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