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In arches, stratified stones are placed so that their planes

A heap of stones can be made up into groups of 21. When made

In stone masonry, stones (stratified rocks) are so placed th

On a straight road XY, 100 metres long, five heavy stones ar

There are two hinged semicircular arches A, B and C of radii

The masses of two uniform discs are in the ratio 1 : 2 and t

If d is the inter-planar spacing of the planes {h k l}, the

China held one of its largest- ever air force drill involvin

The triangular portion between any two adjacent arches and t

Statements Some stones are shells All shells are Pearls Conc