3 oranges, 5 bananas and 2 apples cost Rs.40. However 4 oranges, 10 bananas, and 4 apples costs Rs 70. Find the cost of TEN ORANGES.
option
(a) Rs25
(b) Rs50
(c) Rs30
(d) Cannot be determined

• ans is 50. two equations will be formed 3x+5y+2z=40 and 4x+10y+4z=70 then solve them by dividing 2nd eq. with 2 and then subtract eq. 1 and two .you will get x=5 means one orange cost rs 5 then 10 will cosat 10*5=50
• 10 years agoHelpfull: Yes(9) No(0)
• cost of one orange be x.
  cost of one banana be y.
  cost of one apple be z.
  then from the question , 3x+5y+2z=40 -----1
  4x+10y+4z=70 ----2
  subtract 2 from 1 , then
  x+5y+2z=30 ------3
  from the question 1 - 5y+2z=40-3x ----4
  sub 4 in 3
  den we get x=5
  then cost of 10 oranges are 50
• 10 years agoHelpfull: Yes(1) No(0)
• 3(O)+5(B)+2(A)=40 -(1)
  4(O)+10(B)+4(A)=70 -(2)
  equation (1) multiplied by 2 we get 2(3(O)+5(B)+2(A)=40)= 6(O)+10(B)+4(A)=80 -(3)
  equation 3-1 we get 2(O)=10.so that 10 oranges cost is Rs.50
• 10 years agoHelpfull: Yes(0) No(0)