If Shafin were twice as old as he is now, he would be 40 years older than Monir. If Monir is 10 years younger than Shafin, how old is Shafin?
সঠিক উত্তর: Option B
Suppose,
Shafin’s current age =x years
monir’s current age = (x-10) yers here, 2x=(x-10)+40 or,x=30 years