MEENA WENT OUT FOR SHOPPING.SHE HAD IN HER HADBAG APPROXIMATELY RS15 IN ONE RUPEE NOTES AND 20p COINS WHEN SHE RETURNED SHE HAD AS MANY ONE RUPEE NOTES AS SHE ORIGINALLY HAD AS MANY 20p.coins as she orinally had one rupee notes .she actually came back with 1/3 of what she had started with. how much did she spend and how much did she have when she started?
Answers
Answer:
9.60
Step-by-step explanation:
let us assume that originally meena had X rupees and Y 20 paise coins. Going shopping she had (100X + 20 Y) paise.
she returned with only (100Y + 20X) paise.
This last some as we know is one third of the original and therefore
3(100Y+20X)= 100X + 20Y
simplifying we have X=7Y
If Y=1 then X=7. Assuming this so Mina had 7.20 rupees when she set out for shopping
this is wrong because Meena actually had about 15 rupees.
let us see now what we get if Y=2. Then X=14.
the original sum was 14.40 rupees which accords with the condition of the problem
if we assume that Y=3 then the sum will be too big - 21.60 rupees.
therefore the only suitable answer is 14.40 rupees.
after shopping Meena had 2 one rupee notes and 14 twenty paise coins.
this is actually one third of the original sum 1,440:3 = 480
menace purchase therefore, cost
14.40 - 4.80 = Rs. 9.60
Answer:
Meena spent Rs. 9.60
Step-by-step explanation:
let us assume that originally meena had X rupees and Y 20 paise coins. Going shopping she had (100X + 20 Y) paise.
she returned with only (100Y + 20X) paise.
This last some as we know is one third of the original and therefore
3(100Y+20X)= 100X + 20Y
simplifying we have,
X=7Y
If Y=1 then X=7. Assuming this so Meena had 7.20 rupees when she set out for shopping this is wrong because Meena actually had about 15 rupees.
Let us see now what we get if Y=2. Then X=14.
the original sum was 14.40 rupees which accords with the condition of the problem
If we assume that Y=3 then the sum will be too big -21.60 rupees.
Therefore the only suitable answer is 14.40 rupees.
after shopping Meena had 2 one rupee notes and 14 twenty paise coins.
This is actually one third of the original sum
1,440:3 = 480
Meena purchase cost is,
14.40 -4.80 = Rs. 9.60