In simple interest what sum amounts of Rs.1120/-in 4 years and Rs.1200/-in 5 years ?  Pick:
A) Rs. 500
B) Rs. 600
C) Rs. 800
D) Rs. 900
E) Rs. 700
For 1 year interest= 1200-1120= 
<gadget id="calculator">1200-1120</gadget>
<output>80</output>
80   for 4 year 320   then sum= 1120-320= 
<gadget id="calculator">1120-320</gadget>
<output>800</output>
800   ANSWER:Rs. 800
<result>C</result>
In simple interest what sum amounts of Rs.1120/-in 4 years and Rs.1200/-in 5 years ?