Question

Consider a circular loop of wire lying in the
plane of the table. Let the current pass through
find out the direction of the magnetic field inside
the loop clockwise. Apply the right hand rule to find out the direction of the magnetic field inside and outside the loop.​

Answer 1

Answer:

Correct question :

I have a total of rupees 300 in coins of denominator rupees 1 rup 2 and rupees 5. The number of rupees 2 coins is 3 times the number of rupees 5 coins. The total number of coin is 160. How many coins of each denominatoion is with me?

Solution :

Let the number of Rs 5 coins be x.

Number of Rs 2 coins = 3 x Number of Rs 5 coins = 3x

Number of Re 1 coins = 160 - (Number of coins of Rs 5 and of Rs 2)

= 160 - (3x + x) 160 - 4x

Amount of Re 1 coins

= Rs [1 x (160 - 4x)]

= Rs (160 - 4x)

Amount of Rs 2 coins

= Rs (2 x 3x)

= Rs 6x

Amount of Rs 5 coins

= Rs (5 x X)

= Rs 5x

It is given that the total amount is Rs 300.

160 - 4x + 6x + 5x = 300

160 + 7x = 300

On transposing 160 to R.H.S, we obtain

7x = 300 - 160

7x = 140

On dividing both sides by 7, we obtain

7x = 140

x = 140/7

x = 20

Number of Re 1 coins

= 160 - 4x

= 160 - 4 x 20

= 160 - 80

= 80

Number of Rs 2 coins

= 3x

= 3 x 20

= 60

Number of Rs 5 coins

= x

= 20