AFCAT || Weekly_Revision_Quiz_2020

A train covers a distance of 30 km in 18 minutes. If its speed is decreased by 10 km/hr., the time taken by it to cover the same distance is equal to –

If

A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby gains 20%. The percentage of water in the mixture is

The average height of 50 students of a class is 152 cm. If 10 among them whose average height is 148cm left the class and 10 new boys of average height 150 cm are included in the class, then what will be the new average height of the students of the class?

A train crosses a pole on a platform and 300m long platform in 10 seconds and 25 seconds respectively. What will be the time taken by the train to cross a 100m long platform?

A sum of money invested at compound interest amounts to Rs. 900 in 3 years and to Rs. 990 in 4 years. The rate of interest per annum is –

Two trains, 100 m and 150 m long, are running at a speed of 25 kmph and 35 kmph respectively in the same direction on parallel tracks. How many seconds will they take to pass each other?

Find the value of 4

In Gautam’s opinion, his weight is greater than 66 kg but less than 73 kg. His friend did not agree with Gautam and he said that your weight may be greater than 60 kg but less than 70 kg. His brother’s view is that his weight cannot be greater than 69 kg. If all of them are correct in their estimation, what is the average of different probable weights of Gautam?

7 years ago, the average age of family of 5 members was 19 years. The present average age of the family is same even after two children’s were born with the age difference of two years. What is the present age of youngest child?