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Solutions
Answer: E
A + 5 + B + 5 = 90
A + B = 80 —----->(1)
B + C = 70 —----->(2)
By solving equation (1) and (2), we get
A - C = 10
The ratio of the present age of C to A = 100: 140 = 5: 7
Let, the present age C and A be 5x years and 7x years respectively.
7x - 5x = 10
2x = 10
x = 5
The present age of C = 5 * 5 = 25 years
The present age of D = (25 + 8) = 33 years
Hence, the correct answer is option E