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Question

The edges of a triangular board are 3m,4mand5m. The cost of painting it at the rate of Rs.40and50paisaperm2


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Solution

Given sides of the triangular board are 3m,4mand5m.

This is a right-angled triangle.

Base =4m

Height =3m

Area of triangle=12×b×h

=12×4×3=6m2

Cost of painting a wall per meter square =40.50

The total cost of painting a wall =6×40.50

=Rs.243

Hence, the total cost of painting the wall is Rs.243


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