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The floor of a rectangular field has a perimeter of 250m and it's length and breadth are in the ratio 13:12. If the cost of painting the four walls and ceiling at the rate of ₹5m² is ₹27000, find the height of the hall.

Posted by K Kaviya 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Silviya Shrivastav 4 years, 2 months ago

Area=27000/5 =5400m² Perimeter=2(l+b) 250 =2(12x+13x) 250= 2(25x) 250 =50x 250/50=x = 5 Now, 12x=60 13x=65 CSA=2(l+b)*h(area of four side) 5400m² =2(60+65)*h 5400. =250*h 5400/250=h=21.6

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CBSE > Class 09 > Mathematics