Class : Class 7
let the price of object B be x
the the price of object A is (6x-100)
now ATP,
1(6x-100) + 4*x=1400
=>6x-100 + 4x=1400
=>10x -100=1400
=>10x=1500
=>x=1500/10
=>x=150
now the price of object A=150*6-100
=800(d)
Ans 3:
Class : Class 10
Answer is 3abc cause'.
Centroid in coordinate geometry is equal tO X1+X2+X3/2 , Y1+Y2+Y3/2
THEREFORE 0 EQUAL TO X CORDINATE ANT SO A+B+C EQUAL TO ZERO