Amir lent Rs. 600 to Hameed for 2 years and Rs. 150 to Aman for 4 years and received altogether from both Rs. 90 as simple interest. The rate of interest is
a 4%
b 5%
c 10%
d 12%

Question

Amir lent Rs. 600 to Hameed for 2 years and Rs. 150 to Aman for 4 years and received altogether from both Rs. 90 as simple interest. The rate of interest is
a 	4%
b 	5%
c 	10%
d 	12%

anonymous · Answer

Simple interest formula: I = Prt (interest = amount lent * interest rate * time)

Interest from $600 for 2 years:
I = 600*r*2 = 1200r

Interest from $150 for 4 years:
I = 150*r*4 = 600r

Total interest
1200r + 600r = 90

solve for r

anonymous · Answer

thanks very much,it is 5%,thanks for helping