find the value of x such that the point A(3,2,1),B(4,x,5),C(4,2,-2) are coplaner

• 90-48 =42 not a 48
  

three particles of masses 100g,150g and 200g are placed at the vertices of an equilateral triangle ABC of each side 50cm.find the centre of mass of the system of three particles

if the median of the following distribution is 28.5 find the value of F1 and f2 0-10 10-20 20-30 30-40 50-60 frequency v F1 2015 EP 25 and the total frequency is 60

• Show that angles of an equilateral triangle are 60degree each 
  

6th chapter 6.3

PQRS is a square with diagonal 7root2 cm with p as a centre an arc QS is drawn