The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t31.3

The Śulbasūtras of Baudhāyana, Āpastamba, Kātyāyana and Mānava: With Text, English Translation and Commentary c8.t31.3

i.e. s² = 1 + p/7 ...... (1)

or 7*s*² = 7 + *p*, where *p* is the increased area.