A labour saves rs.2 on 1st aprill in the year 2011. rs.4 on 2nd aprill, rs.6 on 3rd aprill, and so on. if he continue to save this way, how much he saved by the end of the month.
option
a)930
b)900
c)none
d)920

• ans:930
  2+4+6+.....+60.the terms are in a.p.so,the sum of n terms=n/2[a+l](l is the last term)=30/2(2+60)=930
• 11 years agoHelpfull: Yes(20) No(1)
• for all 30days of April 30(30+1)/2=465
  there is 2rs increment every day that comes to 465*2=930
• 9 years agoHelpfull: Yes(0) No(0)