A coffee shop blends 2 kinds of coffee,putting in 2 parts of a 33p. a gm. grade to 1 part of a 24p. a gm.If the mixture is changed to 1 part of the 33p. a gm. to 2 parts of the less expensive grade,how much will the shop save in blending 100 gms.

A.Rs.90 B.Rs.1.00 C.Rs.3.00 D.Rs.8.00

• cost of 3 gms of cofee by putting in 2 parts of a 33p. a gm. grade to 1 part of a 24p. a gm = 90 paisa
  cost of 1 gms of cofee by putting in 2 parts of a 33p. a gm. grade to 1 part of a 24p. a gm = 30 paisa
  
  cost of 3 gms of mixture changed to 1 part of the 33p. a gm. to 2 parts of the less expensive grade = 81 paisa
  cost of 1 gms of mixture changed to 1 part of the 33p. a gm. to 2 parts of the less expensive grade = 27 paisa
  
  Diff in cost for 1 gm mixture = 3 paisa
  diff in cost for 100 gm mixture = 300 paisa = 3 Rs.
• 12 years agoHelpfull: Yes(60) No(12)
• case 1:ratio = 2:1 (2 parts:1parts)
  quantity in 33ppgm =2/3 *100 cost=2/3*100*33=2200p
  quantity in 24ppgm =1/3 *100 cost=1/3*100*24=800p
  total=3000p
  case2: ratio = 1:2(1parts:2parts)
  quantity in 33ppgm=1/3*100 cost =1/3*100*33=1100p
  quantity in 24ppgm=2/3*100 cost =2/3*100*24=1600p
  total cost=2700p
  save =3000-2700=300p
  =3RS ans:C
• 11 years agoHelpfull: Yes(60) No(3)
• diff in cost of 3 gms of coffee= 90-81=9 paisa
  Diff in cost of 100 gms of coffee=100*9/3=300 paisa= 3 Rs....option C
• 12 years agoHelpfull: Yes(38) No(4)
• for 3 gm difference is= 9p
  for 1 gm difference is= 3p
  for 100 gm= 3*100=300p
• 10 years agoHelpfull: Yes(0) No(3)