Question

if sharda has 50 rupees notes. its 5 times she has 20 rupees notes.She has total 900 rupees then how many notes of 20 she have?

Answer 1

According to the question, Sharda has 50 rupees notes, its 5 times she has 20 rupees notes and She has total 900 rupees.
Then,
20 x + 50 y = 900   ......... (1)
From the given data we know that, Sharda has twice as many as 20 rupees as 50 rupees which indirectly means that,
x = 2y  ......... (2)
Put this value in equation (1) , we get:
20 (2y) + 50 y = 900
40 y + 50 y = 900
90 y = 900
y = 900 / 90
y = 10
Put this value in equation (2), we get:
x = 2y
x = 2 (10)
x = 20
Hence,
20 . (20) + 50 . (10) = 900
which shows that Sharda has 20 Twenty rupee notes and 10 Fifty rupee notes.
Hope it will help you. Thanks.

Answer 2

Let no of notes of ₹ 50 be x & ₹ 20 notes will be 5x.

Value of ₹50 notes= 50× x= 50x
Value of ₹20 notes = 20 × 5x= 100x

50x + 100x =900

150x = 900

x= 900/150= 90/15

x= 6

₹50 notes = x = 6

₹20 notes = 5x = 5× 6= 30


Hence, Sharda have ₹ 20 notes= 30

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Hope this will help you....