Answer :-
Step by step explanation :-
- <u>Unitary</u><u> </u><u>method</u><u> </u><u>:</u><em><u>-</u></em><em><u> </u></em>
Cost of 10 balls = 36
Cost of one ball = 36 / 10 => 3.6
Cost of 48 balls = 48 × 3.6
=> 172.80
- <u>Direct</u><u> </u><u>Variation</u><u> </u><u>method</u><u> </u><u>:</u><u>-</u><u> </u>
No. of balls (a)
10
48
Cost of balls ( b)
36
y
Direct Variation ( a / b )
![\sf\longmapsto \: \frac{10}{36} = \frac{48}{y}](https://tex.z-dn.net/?f=%5Csf%5Clongmapsto%20%20%5C%3A%20%20%5Cfrac%7B10%7D%7B36%7D%20%20%3D%20%20%5Cfrac%7B48%7D%7By%7D%20)
![\sf\longmapsto 10y = 36 \times 48](https://tex.z-dn.net/?f=%5Csf%5Clongmapsto%2010y%20%3D%2036%20%5Ctimes%2048)
![\sf\longmapsto 1 0y = 1728](https://tex.z-dn.net/?f=%5Csf%5Clongmapsto%201%200y%20%3D%201728)
![\sf\longmapsto y = \frac{1728}{10}](https://tex.z-dn.net/?f=%5Csf%5Clongmapsto%20y%20%3D%20%20%5Cfrac%7B1728%7D%7B10%7D%20)
![\sf\longmapsto 172.80 \: rupees](https://tex.z-dn.net/?f=%5Csf%5Clongmapsto%20172.80%20%5C%3A%20rupees)
<em><u>Cost of 48 balls is 172.80 rupees </u></em>
<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>~</em>
I think the answer could be either 1:1 or 6:6