223. A man's investment doubles in every 5 years. If hell
invested 5000 in each of the years 1990, 1995,200
and 2005, then what was the total amount received
by him in 2010?
(a) 30000
(b) * 70000
(c) <140000
(d)* 150000
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Answer:
The amount he invests in 1990 will be 25000 in ,2010
Similarly the amount he invests in1995 will be 20000 in 2010
The amount he invests in 2000 will be 15000
The amount he invests in 2005 wil be 10000
If we add all these the amount becomes 70000
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