A sum of Rs.4000 is lent out in two parts, one at 8% simple interest and the other at 10% simple interest. In the annual interest is Rs.352, the sum lent at 8% is  Choose the correct choice:
A) 2376  B) 3678  C) 3657  D) 2400  E) 2661
S.I = PNR/100   Answer with Explanation: Step (i) Given the total sum = Rs. 4000 Let the sum lent at 8% be Rs.x Let the sum lent at 10% be Rs. 4000 – x Ie) P = x , n=1, R = 8% P = 4000-x , n=1, R = 10%   100 81 XxX =   100 8x   100 1014000 XxX =   100 1040000 x    Given annual interest = Rs. 352   100 8x +   100 1040000 x  = 352 8x – 10x = 35200 – 40000 -2x = -4800   X =   2 4800 = Rs.2400/-   Answer:2400
<result>D</result>
A sum of Rs.4000 is lent out in two parts, one at 8% simple interest and the other at 10% simple interest. In the annual interest is Rs.352, the sum lent at 8% is