Angelina leaves her house walking at a speed of 20 meters per minute. her sister walks behind her 15 minutes later at a speed of 25 meters per minute. after how many minutes has angelina’s sister caught up to her?

Anglena's sister will caught up to her in 60 minutes.

Step-by-step explanation:

equation of Angelina's walk can be described as

20m + 20(15),

whee m are the total minutes  she has traveled.

Angelina's sister will  be 25m, because

she doesn't have the starting advantage that Angelina has.

we will  make them equal to each other to see what the value of m should be so that both of them  have traveled the same distance (when Angelina's sister catches up to Angelina).

20m + 20(15) = 25m              

20(15) = 5m                            subtracting 20m from both sides

300 = 5m                               multiplying the 20(15)

m=

m=60 minutes

Answer

Angelina's sister will have caught up to her after 60 minutes.

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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circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice