When Rand balefires Graendals place about how far away from it is he and how long does it take for the balefire to hit it after he weaves it?

How far?

Up ahead, the trees broke. Min hastened to join Rand and Nynaeve, who had stopped at the top of a gently sloping ridge. Here, they could see over the forest, and the trees continued down below like a sea of green and brown. The pines parted at the shores of a small mountain lake, caught in a triangular depression of the land.

 

Atop a ridge of its own, high above the water, was an impressive white stone structure.[...] not so distant that Min couldn’t make out the figures of men walking the battlements on guard, halberds at their shoulders, breastplates reflecting the late sunlight. A late party of hunters rode in through the gates, a fine buck deer lashed to the packhorse, and a group of workers chopped at a fallen tree nearby, perhaps for firewood. A pair of serving women in white carried poles, bucket at each end, up from the lake, and lights were winking on in windows the length of the structure. It was a living, working estate bundled up in a single massive building.

How long?

as quick as a snap of the fingers