20 women can do a work in 15 days and 15 men can complete a work in 12 days. What is the ratio between the capacity of men and women?

(20*15) women can do a work in 1 day.

So women 1 day =1/300

(15*12) men can do a work in 1 day

So men 1 day work=1/180

So, required ratio=(1/300)/(1/180)

=(1/5)/(1/3)

=3/5

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A car travel first half distance between two places with a speed of 40 km per hour and the rest of half distance with the speed of 60 km per hour. The average speed of car is:

Let the total distance covered be "s"km.

Total time taken,

=(s/2)/40+(s/2)/60

=5s/240

Average speed,

=s/(5s/240)

=s*(240/5s)

=48 km/ hr

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In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

CE, GI, KM, OQ, ?

The letters of each term are alternate and also the last letter of each term and the first letter of the next term are alternate.

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A person Travels 50 km per hour. If we increase his speed by 10 km per hour, how many minutes will it take to cover 7500 m.

Speed= 50 km per hour

If the speed is increased by 10 kilometre per hour

Then the new speed= 60 km per hour

So distance covered in 1 hour=60 km/ hr

Then the distance covered in 60 minute= 60000

Distance covered in 1 minute=1000m

The new speed 1000 per minute=1000 m /min

Distance to be covered 7500 m= 7500 meters.

Time=7500/1000=7.5 min

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A + B means A is the son of B;

A - B means A is the wife of B;

A x B means A is the brother of B;

A Ã· B means A is the mother of B; and

A = B means A is the sister of B.

What does P = R Ã· Q mean?

Option (A)

P = R Ã· Q means P is the sister of R who is the mother of Q i.e. P is the aunt of Q.

So, the answer is (a).