please help me please help me
Answers
Required Answers :-
1. 78 : 52
Canceling by 2
39 : 26
Canceling by 13
3 : 2
2. Ratio of second quantity to first quantity
3 : 1.5
2 : 1
3. Convert 15 : 20 into percentage form
15/20 × 100
15 × 5
75 %
4. Write the ratio of 10 years 6 months to 21 years in reduced form
10 y 6 m = 10 × 1/2 = 21/2 y
21/2 : 21
21 : 42/2
21 : 42
1 : 2
6. Find the ratio of length of side of a square to the length of a diagonal
Let the side be x
Diagonal = √2 × side
Diagonal = √2x
Ratio = x : √2x
Ratio = 1 : √2
7. x is the geometric mean of 16 and 9
x = √(ab)
x = √(16 × 9)
x = 4 × 3
x = 12
8. a : b = 2 : 1 & b : c = 4 : 1
a/b = 2/1
b/c = 4/1
a/b × b/c = 2/1 × 4/1
a/c = 8/1
a : c = 8 : 1
9. a/3 = b/7 = 7a - 2b/x
a/3 = b/7 = 7a - 2b/x
10. Ratio of circumference to the diameter
Let the diameter be d
Circumference = 2πr
Cirumference = πd
Ratio = πd : d
Ratio = π : 1