Average of the ages of Rakesh, Mahesh, Suresh and Ramesh three years ago was 32 years. Average of the present ages of Mahesh and Suresh is 36 years. Ramesh is 4 years older than Rakesh. Find the present age of Rakesh ? तीन साल पहले राकेश, महेश, सुरेश और रमेश की उम्र का औसत 32 साल था। महेश और सुरेश की वर्तमान आयु का औसत 36 वर्ष है। रमेश राकेश से 4 साल बड़ा है। राकेश की वर्तमान आयु ज्ञात कीजिये?

Let the four ages 3 years ago be R, M, S, and Ra. Their average was 32, so sum was 4 × 32 = 128. Therefore, current sum = 128 + 12 = 140. Let Ra = Rk + 4 (Ramesh is 4 years older than Rakesh). Also, M + S = 2 × 36 = 72 (current average of Mahesh and Suresh is 36). So: Rk + (M + S) + Ra = 140. Substituting: Rk + 72 + (Rk + 4) = 140, giving 2Rk + 76 = 140, so 2Rk = 64, Rk = 32. Rakesh's present age is 32 years.