A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. Then the speed of boat in still water and the speed of current are respectively. 

Directions: The following bar graph shows the percentage breakup of a Sunil’s salary from year 2012 to 2016. With the given information, find the following questions.

Every year there is an increase of 100% in monthly salary as compared to previous year’s monthly salary then what is the ratio of monthly salary in 2016 to the expenses on travelling in 2013.

The LCM of two numbers is 12 times their HCF. The sum of the HCF and the LCM is 403. If one of the number is 93, then the other number is. 

If there is a reduction in the number of workers in a factory in the ratio 65 : 17 and an increment in their wages in the ratio 34 : 125, then the ratio by which the total wages of the workers should be decreased is-

The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

At what time between 7 and 8 o'clock will the hands of a clock be in the same straight line but, not together?

If the radius and height of a cylinder increase by 20% and15% respectively. Then what is the % change in curved surface area?