Question

A student has 8 five rupee coins and some two rupee coins which make total 80 rupees how many two rupees coin he has​

Answer 1

Answer:

He has 8 five rupees coin=8×5=40 rupees

20 two rupee coin he has

Answer 2

The number of two rupee coins is 20.

Given:

Number of five rupee coins=8

Total amount=Rs. 80

To find:

The number of two rupee coins

Solution:

The sum of the coins' value will be equal to Rs.80.

The value of Rs.5 coins=5×number of five rupee coins

=5×8

=Rs.40

Let the number of two rupee coins be X.

The value of Rs.2 coins=2×number of two rupee coins

=2×X

=Rs.2X

The total amount=value of five rupee coins+value of two rupee coins

80=40+2X

80-40=2X

40=2X

40/2=X

20=X

Therefore, the number of two rupee coins is 20.