A two-hinged semicircular arch of radius 25 m carries a load system as shown in figure. The horizontal thrust at each support is ____ kN.
25.46

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Solution

The correct option is A 25.46
$H = \frac{60}{π} s i n^{2} 45^{\circ} + \frac{30}{π} s i n^{2} 90^{\circ} + \frac{80}{π} s i n^{2} 30^{\circ}$

$= \frac{30}{π} + \frac{30}{π} + \frac{20}{π} = \frac{80}{π} k N$

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