Solve, If a+b =5 and 3a+2b=20, then (3a+b)=?

  1. 10
  2. 15
  3. 20
  4. 25
Monis Rasool Professor Asked on 21st May 2015 in Maths.
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1 Answer(s)

Answer: (4) 25

Solve
a + b = 5                     …………….  (1)

3a + 2b = 20               ……………….(2)

Solve the equation (1) and (2)

a = 10    and b = – 5

Put the value of a and b in (3a + b)

3a + b = 3 x 10 + (-5)

30 – 5 = 25                                  Ans.

Anurag Mishra Professor Answered on 22nd May 2015.
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