112.5 takay komate hobe 12.5 tk
1 takay komate hobe (12.5/112.5) tk
100 takay komate hobe (12.5x100) /112.5 tk
Ans 11.11 tk
30L acid 21L water 9L
for ratio 3:7
acid 21L and water 21/3 x 7 = 49L
have to add 49-9= 40L
a:b=b:c
=a/b=b/c
=>b2=ac
Lhs
=(a+b/b+c)^2
=a2+2ab+b2/b2+2bc+c2
=a2+2ab+ac/ac+2bc+c2
=a(a+2b+c)/c(a+2b+c)
=a/c
Rhs
a2+b2/b2+c2
=a2+ac/ac+c2
=a(a+c)/c(a+c)
=a/c
L.H.S=R.H.S
25(𝑎+2𝑏)−36(2𝑎−5𝑏)2
25𝑎+50𝑏−36(2𝑎−5𝑏)2
25𝑎+50𝑏−36(2𝑎−5𝑏)(2𝑎−5𝑏)
25𝑎+50𝑏−36(2𝑎(2𝑎−5𝑏)−5𝑏(2𝑎−5𝑏))
25𝑎+50𝑏−36(4𝑎2−10𝑎𝑏−5𝑏(2𝑎−5𝑏)
25𝑎+50𝑏−36(4𝑎2−10𝑎𝑏−10𝑎𝑏+25𝑏2)
25𝑎+50𝑏−36(4𝑎2−20𝑎𝑏+25𝑏2)
25𝑎+50𝑏−144𝑎2+720𝑎𝑏−900𝑏2
−144𝑎2+720𝑎𝑏−900𝑏2+25𝑎+50𝑏