Question

1 x and 3.5y vary directly and x = 7 when y = 10, find x when y =15​

Answer 1

${\bigstar}$SOLUTION${\bigstar}$

DIRECT VARIATION:

➠One quantity varies irrespective to the other in equal intervals .

➠It is also known as direct proportion

here

x = 7 , y = 10

x = ❓,y = 15

by cross multiplication,

x × 10 = 7 × 15

x = 105 /10

x = 10.5

Answer 2

DIRECT VARIATION:

➠One quantity varies irrespective to the other in equal intervals .

➠It is also known as direct proportion

here

x = 7 , y = 10

x = ❓,y = 15

by cross multiplication,

x × 10 = 7 × 15

x = 105 /10

x = 10.5