answer the question no. 9
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let the Rs 5 coins = x
then number of Rs 10 coins = 2x
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given total vlaue of coins = Rs 250
according to question ,
5(x) + 10(2x) = 250
5x + 20x = 250
25x = 250
x = 10
number of Rs 5 coin ' x ' = 10
number of Rs 10 coins =2x = 2×10=20
therefore , there are 10 coins of Rs 5 and 20 coins of Rs 10 denomination
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VERIFY :
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Rs 10 coins = 2x = 2×10
= 20 =20 ×10 = Rs 200
Rs 5 coins =x = 10
=10 × 5 = Rs 50
x + 2x = Rs 250
Rs 50 + Rs 200=Rs 250
Rs 250 = Rs 250
L.H.S = R.H.S
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therefore, the obtained numbers of coins are correct.
_______________________________
let the Rs 5 coins = x
then number of Rs 10 coins = 2x
_______________________________
given total vlaue of coins = Rs 250
according to question ,
5(x) + 10(2x) = 250
5x + 20x = 250
25x = 250
x = 10
number of Rs 5 coin ' x ' = 10
number of Rs 10 coins =2x = 2×10=20
therefore , there are 10 coins of Rs 5 and 20 coins of Rs 10 denomination
______________________________
VERIFY :
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Rs 10 coins = 2x = 2×10
= 20 =20 ×10 = Rs 200
Rs 5 coins =x = 10
=10 × 5 = Rs 50
x + 2x = Rs 250
Rs 50 + Rs 200=Rs 250
Rs 250 = Rs 250
L.H.S = R.H.S
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therefore, the obtained numbers of coins are correct.
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TheLostMonk:
your question is wrong , this question should be according to the solution i provided.
they saying number of 5 rupee coins is double the number of 10 rupee coins. nut its wrong , in actual the mumber of Rs 10 coins is twice(double ) the number of Rs 5 coins.
if we solve it , according to question that is written in the then number of coins are in decimal. and its not possible , natural numbers/coins can not be in decimal.
correct your question , write Rs 10 in place of Rs 5. and Rs 5 in place of Rs 10.
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