A symmetrical parabolic arch of span 20 meters and rise 5 meters is hinged at the springings. It supports a uniformly distributed load of 2 tonnes per meter run of the span. The horizontal thrust in tonnes at each of the spring is
1
0
2
8
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20
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16
A symmetrical parabolic arch of span 20 meters and rise 5 meters is hinged at the springings. It supports a uniformly distributed load of 2 tonnes per meter run of the span. The horizontal thrust in tonnes at each of the spring is