An object has a mass of 12 kg. on planet a, the object weighs 69 n. the force of gravity on planet a is:

Agar woh thoda size mei bada ho to aa raha hai aur door jaata hai to gayab ho jata hai aur chamakta hai.

400ml has 15% alcohol i.e 60ml . means we have 340ml of water or the liquid with alcohol is mixed
let v be the volume of alcohol added to make the strength 32%
then v/340+v = 32/100. solving we get v as 160ml

so we need to add 160 -60 = 100ml of alcohol