Question

If a cost price of 3 hockies and 4 balls is 320 RS and the cost of 4 hockies and 3 balls 380 RS. Find
the price of 5 hockies and
8 balls.​

Answer 1

Answer:

Step-by-step explanation:

Let hockey bat be x

Ball be y

According to the question

3x+4y=320…i

4x+3y=380…ii

Adding eq I and ii

7x+7y=700

7(x+y)=700

x+y=700/7=100…iii

Subtract eq I from eq ii

x-y=60…iv

On adding eq iii and iv

x+x+y-y=100-60

2x=40

x=40/2=20

Substitute the value of x in eq iii

x+y=100

y=100-20=80

Cost of 5 hockey and 8 ball= 5*20+8*80=100+640=740