Some amount out of Rs. 7000 was lent at 6 % p.a. and the

Some amount out of Rs. 7000 was lent at 6 % p.a. and the remaining at 4 % p. a. If the total simple interest from both the fractions in 5 years was Rs. 1600, the sum lent at 6 % p. a. was —

According to question ,

Average annual rate =		1600	×	1000		%
		7000		5

Average annual rate =		32		%
		7

∴ (Amount at 6%) : (Amount at 4%) =	4	:	10	= 2 : 5
	7		7

∴ Sum lent at 6% = Rs.		700 ×	2
			7

Hence, Sum lent at 6% = Rs. 2000.