A tape manufacturer reduces the price of his heavy duty tape from Rs.30/- to Rs.28/- a reel and the price of a regular tape from Rs.24/- to Rs.23/- a reel. A computing centre normally spends Rs.1440/- a month for tapes and 3/4 of this is for heavy duty tapes. How much will they save a month under the new prices?

• A computing centre normally spends Rs.1440/- a month for tapes and 3/4 of this is for heavy duty tapes.
  
  Amt spent on HD tapes = 1440*3/4 = Rs 1080.
  Amt saved on HD tapes = 1080*2/30 = Rs 72.
  Amt spent on regular tapes = Rs 360
  amt saved on regular tapes = 360*1/24 = Rs 15
  
  Total amt saved = 72+15 = Rs 87
• 13 years agoHelpfull: Yes(54) No(9)
• for old price
  Hd tape = (3/4)*1440 = 1080
  Hd tape + Reg tape = 1440
  (3/4)*1440 + Reg tape = 1440
  SO, Reg tape = 360
  HD tape = 1080
  no. of reg tape = 360/24 = 15
  no. of HD tape = 1080/30 = 36
  For new price, Hd tape savings = (30-28) = 2
  Reg tape savings = 24-23 = 1
  Total savings = (36*2)+(15*1) = 87
  
  Note : here the twist in question is Rs.1440 is the expense of both reg and HD tapes. and not reg tapes alone..so be careful..
• 11 years agoHelpfull: Yes(28) No(0)
• 1440 * 3/4 = 1080
  1080 / 30 = 36
  1440 * 1/4 = 360
  360 / 24 = 15
  36 * 2 + 15 * 1 = 87
• 12 years agoHelpfull: Yes(24) No(2)
• Total Expenditure on tapes=Rs.1440
  
  Total Expenditure on heavy duty tapes=3/4*1440=Rs.1080
  Total reels of heavy duty tape=1080/30=36
  Total savings on heavy duty tape=36*(30-28)=Rs.72
  
  Total Expenditure on regular tapes=1/4*1440=Rs.360
  Total reels of regular tape=360/24=15
  Total savings on regular tape=15*(24-23)=Rs.15
  
  Total Savings=Rs.72+Rs.15=Rs.87
• 8 years agoHelpfull: Yes(3) No(0)
• Given that (3/4)th of 1440 is spent on heavy duty tape.
  Therefore, cost spent on heavy duty tape= 1440*(3/4)=1080.
  If Rs.1080 is spent on heavy duty tape, then the number of heavy duty tape bought= 1080/30=36.
  The balance Rs.360 is spent on regular tape.
  Therefore the number of normal tapes= 360/24=15.
  Now for the new price rates, the cost spent by the company= 36(38)+15(23)=1353.
  Thus the amount saved= 1440-1353=87.
• 6 years agoHelpfull: Yes(0) No(0)