Question

The cost of 10 balls is rupees 36 , Find the cost of 48 balls using ( the method )

Answer 1

Answer :-

• 172.80

Step by step explanation :-

• Unitary method :-

Cost of 10 balls = 36

Cost of one ball = 36 / 10 => 3.6

Cost of 48 balls = 48 × 3.6

=> 172.80

• Direct Variation method :-

No. of balls (a)

10

48

Cost of balls ( b)

36

y

Direct Variation ( a / b )

$\sf\longmapsto \: \frac{10}{36} = \frac{48}{y}$

$\sf\longmapsto 10y = 36 \times 48$

$\sf\longmapsto 1 0y = 1728$

$\sf\longmapsto y = \frac{1728}{10}$

$\sf\longmapsto 172.80 \: rupees$

Cost of 48 balls is 172.80 rupees

Hope it helps~