Rajat bought three packets of biscuits for rupees 24 how much money is required to buy 7 such packets
Answers
Answered by
1
Let the no of packets be x
let the cost of each packet be y
so xy = 80 ⇒ y = 80/x
so if he would have bought 4 more packets for the same amount, each packet would have cost rupees 1 less (x+4)(y-1)=80
⇒ (x+4)(80/x-1)=80
⇒ x² + 4x - 320 = 0
⇒ x² + 20x - 16x - 320 = 0
⇒ (x - 16)(x + 20) = 0
so x = 16 or - 20
so number of packets can't be negative
so 16 packets he bought ANSWER
Answered by
2
Answer:
Step-by-step explanation:
price of 1 packet of biscuit be x:
x × 3 ⇒ 24
x ⇒ 24÷3
x⇒8
value of 1 packet is 8 rupees
price of 7 packets:
⇒ 8 × 7
answer⇒ 56
hope this helps you
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