Question

Ratio and Proportion
Multiple Choice Questions (MCQs)

1. If x, 30, 24 and 16 are in proportion then find the value of x.
(a) 45
(b) 60
(c) 80
(d) none of these

2. If 8, 18, 18 and x are in proportion then find the value of x.
(a) 405
(b) 40.5
(c) 81
(d) none of these

3. If 14, 16, x and 24 are in proportion then find the value of x.
(a) 105
(b) 10.5
(c) 21
(d) none of these

4. The mean proportion of 9 and 16 is:
(a) 3
(b) 12
(c) 33
(d) 11

5. The ratio of 90 cm to 1.5 m is …………….
(a) 3 : 5
(b) 5 : 3
(c) 60 : 1
(d) 4 : 3



plz answer this question ​

Answer 1

Answer:

1) a

2) b

3) c

4) b

5) a

Step-by-step explanation:

1) 24/16 = 3/2

so x/30 = 3/2

2x = 3 (30)

2x = 90

x = 90/2

x = 45

2) 8/18 = 4/9

so 18/x = 4/9

4x = 9 (18)

4x = 162

x = 162/4

x = 40.5

3) 14/16 = 7/8

so x/24 = 7/8

8x = 7 (24)

8x = 168

x = 168/8

x = 21

4) let mean proportion be x

x*2 = 9 (16)

x*2 = 144

x. = √144

x = 12

5) 1m = 100 cm

1.5m = 150cm

90/150 = 3/5

braniest plz

Answer 2

Answer:

already given by many so abcd