the cost of papering four walls of a room at 75 Paisa per square metre is rupees 240 the height of the room is 5 M find the length and the breadth of the room if they are at the ratio 5 is to 3
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Answered by
58
height = 5m
let, l = 5x and b = 3x
LSA of room = 240/0.75 = 320m²
we know, LSA = 2h (l+b)
320 = 2 * 5 (5x + 3x)
= 10(8x)
= 80x
x = 320/80
= 4
l = 5*4 = 20
b= 3 * 4 = 12
let, l = 5x and b = 3x
LSA of room = 240/0.75 = 320m²
we know, LSA = 2h (l+b)
320 = 2 * 5 (5x + 3x)
= 10(8x)
= 80x
x = 320/80
= 4
l = 5*4 = 20
b= 3 * 4 = 12
Answered by
22
Answer:
l=20 m , b=12 m
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