8RB Group D 23-Sep-2018 Shift 1 Solved Paper

Question : 7 of 100

Marks: +1, -0

In a square park having a side of

23 \ { m}

two

3 \ { m}

wide paths run through the centre of the park. What will be the total cost of gravelling the path at the rate of

\Rs.1 \/ {dm}^{2} ?

Solution:

Area of one path

=23 \×3=69

Area of both path

=2 \×69=138

Shaded area is common to both paths.
So total path area

=138-(3 \×3)=129 { m}^{2}

Cost for per

{dm}^{2}=\Rs. 1

.
So total cost

=129 \×100=\Rs. 129,00

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