What is the equivalent ratio of 1:2 = __:4

2:4

Step-by-step explanation:

Notice how the 2 has now become a 4

that implies that the ratio has been doubled, to make the ratio remain the same we have to double the 1, double of 1 is 2 so the new ratio is 2:4

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest