When a long glass capillary tube of radius 0.015 cm is dipped in a liquid, the liquid rises to a height of 15 cm within it. If the contact angle between the liquid and glass to close to 0°, the surface tension of the liquid, in millinewton m–1, is [ρ(liquid) = 900 kgm^–3, g = 10 ms^–2] (Give answer in closest integer) _____.