A triangular plot has sides 35 m,54m and 61 m. It is to be levelled at Rs 4 per square metre. If the total bill is to be estimated, find the area (in m2) first.
Class 9Area of a Triangle by Heron's FormulaMensuration
A939.15
B1878.3
C844.15
D1034.15
Step-by-Step Solution
s=235+54+61=75. Area = 75⋅(75−35)⋅(75−54)⋅(75−61)=75⋅40⋅21⋅14=882000=939.15m2 (rounded to 2 decimals).
Answer: A) 939.15
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