CBSE Class 9 Answered
Please explain this problem both
Asked by abhirajlokhande | 17 Mar, 2019, 10:30: AM
Expert Answer
The given sides of triangle are pythagorian triples ( 52 + 122 = 132 ), 5 cm and 12 cm are sides of right angles.
Hence area of sheet = (1/2)×5×12 = 30 cm2 .
area also can be calculated using formula = , where a,b and c are sides and
s = (a+b+c)/2 is semi-perimeter of triangle.
hence area of sheet =
cost of painting for both sides of sheet = 2 × 30 ×30 = Rs.1800
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hence a = 4 and b = 1
Answered by Thiyagarajan K | 17 Mar, 2019, 12:30: PM
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