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Question (21)

QN0019992

Sixteen workers can complete a task in 15 days. Eight workers will complete it in:

(A) 20 days
(B) 24 days
(C) 30 days
(D) 32 days

Correct Answer: C

Explanation:

16 × 15 = 8 × x, so x = 30 days.

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Question (22)

QN0019993

A car takes 12 hours to travel a fixed distance at 50 km/h. At 75 km/h, the time required is:

(A) 6 hours
(B) 7 hours
(C) 8 hours
(D) 9 hours

Correct Answer: C

Explanation:

50 × 12 = 75 × x, so x = 8 hours.

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Question (23)

QN0019994

If x and y vary inversely and x = 6 when y = 18, find x when y = 9.

(A) 10
(B) 12
(C) 14
(D) 16

Correct Answer: B

Explanation:

6 × 18 = x × 9, so x = 12.

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Question (24)

QN0019995

Which situation does NOT represent inverse proportion?

(A) Number of workers and time for same work
(B) Speed and time for fixed distance
(C) Number of taps and filling time
(D) Radius of a circle and its circumference

Correct Answer: D

Explanation:

Circumference is directly proportional to radius.

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Question (25)

QN0019996

If 25 workers finish a project in 28 days, 35 workers will finish it in:

(A) 18 days
(B) 20 days
(C) 22 days
(D) 24 days

Correct Answer: B

Explanation:

25 × 28 = 35 × x, so x = 20 days.

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Question (26)

QN0019997

If x × y = 200 and x = 25, then y =

(A) 6
(B) 7
(C) 8
(D) 10

Correct Answer: C

Explanation:

y = 200 ÷ 25 = 8.

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Question (27)

QN0019998

Twelve machines complete a task in 35 hours. Twenty machines will complete it in:

(A) 18 hours
(B) 20 hours
(C) 21 hours
(D) 24 hours

Correct Answer: C

Explanation:

12 × 35 = 20 × x, so x = 21 hours.

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Question (28)

QN0019999

In inverse proportion, if one quantity becomes three times, the other quantity becomes:

(A) Three times
(B) Half
(C) One-third
(D) Double

Correct Answer: C

Explanation:

In inverse proportion, increase in one quantity causes proportional decrease in the other.

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Question (29)

QN0020000

If 30 people can finish a work in 24 days, 18 people will need:

(A) 36 days
(B) 40 days
(C) 42 days
(D) 48 days

Correct Answer: B

Explanation:

30 × 24 = 18 × x, so x = 40 days.

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Question (30)

QN0020001

If x and y are inversely proportional and x = 4, y = 30, find y when x = 5.

(A) 20
(B) 22
(C) 24
(D) 26

Correct Answer: C

Explanation:

4 × 30 = 5 × y, so y = 24.

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Question (21)

Sixteen workers can complete a task in 15 days. Eight workers will complete it in:

Explanation:

Link:

Question (22)

A car takes 12 hours to travel a fixed distance at 50 km/h. At 75 km/h, the time required is:

Explanation:

Link:

Question (23)

If x and y vary inversely and x = 6 when y = 18, find x when y = 9.

Explanation:

Link:

Question (24)

Which situation does NOT represent inverse proportion?

Explanation:

Link:

Question (25)

If 25 workers finish a project in 28 days, 35 workers will finish it in:

Explanation:

Link:

Question (26)

If x × y = 200 and x = 25, then y =

Explanation:

Link:

Question (27)

Twelve machines complete a task in 35 hours. Twenty machines will complete it in:

Explanation:

Link:

Question (28)

In inverse proportion, if one quantity becomes three times, the other quantity becomes:

Explanation:

Link:

Question (29)

If 30 people can finish a work in 24 days, 18 people will need:

Explanation:

Link:

Question (30)

If x and y are inversely proportional and x = 4, y = 30, find y when x = 5.

Explanation:

Link:

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