The ratio of boys to girls in a choir is 3 to 9. There are 45 girls in the choir, how many members are in the choir?

There are 15 boys in the choir

Step-by-step explanation:

If there are 45 girls in the choir and the ratio of boys to girl is 3 to 9, you would have to multiply the 9 by 5 to get 45. You have to do the same thing to both sides so you would also multiply the 3 by 5 to get 15. The new ratio is 15 to 45.

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step-by-step explanation:

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

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