If the true discount on s sum due 2 years hence at 14% per annum be Rs. 140, the sum due is:  Choose the correct choice from the following answers
A) s. 768	B) s. 640	C) s. 1960	D) s. 2400	E) s. 2800
td=pw*r*t/100 so 140=pw*14*2/100 so pw=500   sum=pw+td..   sum=500+140= 
<gadget id="calculator">500+140</gadget>
<output>640</output>
640   ANSWER:s. 640
<result>B</result>
If the true discount on s sum due 2 years hence at 14% per annum be Rs. 140, the sum due is: