Question
The washing machine works on the principle of
-Solution
Washing machines work on the principle of centrifugation. They are based on medium sized centrifuges that put an object in rotation around a fixed axis, applying force perpendicular to the axis.
A sum of money grows to Rs. 4,900 in 4 years and Rs. 5,600 in 6 years under simple interest. What is the original principal amount?
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