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1. If Mamun were twice as old as he is now, he would be 40 years older than Jamal. If Jamal is 10 years younger than Mamun, How old is Mamun?
- A. 20
- B. 20
- C. 20
- D. 20
Answer: Option B
Explanation:
Ler, Jamal = x
Mamun = x + 10
2 ( x + 10) = x + 40
x = 20
Now, Mamun is ( 20 + 10) = 30
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