Solution:
Let the original number be x .
As per the problem I took a number, wrote a 9 to the right of it,
So we have x9
Again added the doubled original number to the result.
x9+2x
The resulting sum is 633. so we can write
Hence the original number is 52.
The area of a square floor on a scale drawing is 81 square centimeters, and the scale drawing is 1 centimeter:2 ft.
so the original area is
A = 81 sq cm ( 2 ft / 1 cm)^2a = 324 sq ft
so the ratio of the ratio the area in the drawing to the actual area is:
r = 81 sq cm / 324 sq ftr = 1 sq cm / 4 sq ft1 sq cm : 4 sq ft
Answer: 1.8kg
55.5-53.8= 1.7 in the first weeks
3.5- 1.7= 1.8 for final week
The max of Lauren's age --> the minimum of the others' ages, 1, 2 & 3
4*avg = 4*9 = 36
36 - (1+2+3) = 30
Lauren is 30 yrs of age, or younger.
