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If a, b, c are in proportion, then...

If a, b, c are in proportion, then

A

`a^(2) = bc`

B

`b^(2) = ac`

C

`c^(2) = ab`

D

none of these

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The correct Answer is:
B
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RS AGGARWAL-RATIO, PROPORTION AND UNITARY METHOD-TEST PAPER-10
  1. Find the ratio of: a. 90 cm to 1.05 m b. 35 minutes to an hour ...

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  2. The ratio of zinc and copper in an alloy is 7:9. If the weight of copp...

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  3. Divide "Rs. 1400 among A, B and C in the ratio 2:3:5.

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  4. Prove that (5:6) > (3:4).

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  5. 40 men can finish a piece of work in 26 days. How many men will be nee...

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  6. In an army camp, there were provisions for 425 men for 30 days. How lo...

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  7. Find the value of x when 36: x::x:16.

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  8. Show that 48, 60, 75 are in continued proportion.

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  9. Two numbers are in the ratio 3:5 and their sum is 96. The larger numbe...

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  10. A car travels 288 km in 4 hours and a train travels 540 km in 6 hours....

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  11. The first three terms of a proportion are 12. 21 and 8 respectively. T...

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  12. The ratio 92 : 115 in simplest form is

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  13. If 57:x::51: 85, then the value of x is

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  14. If 4:5:: x:45, then the value of x is

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  15. If a, b, c are in proportion, then

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  16. 10 boys can dig a pitch in 12 hours. How long will 8 boys take to d...

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  17. In covering 148 km, a car consumes 8 litres of petrol. How many kilome...

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  18. Fill in the blanks a. (14)/(21)= (square)/(3)= (6)/(square) b. 90...

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  19. Write 'T' for true and 'F' for false for the statement given below: ...

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