A man travels a distance of 10 miles at 20 miles per hour and returns over the same route at 30 miles per hour. What is his average speed for the round trip in miles per hour?
Mr. Arif can complete a job in 15 minutes, while Mr. Asif takes twice as long to do the same job. If they work together, how many minutes will they require to complete the job?
If x
A = B
A < B
A > B
B < Y
A rectangular area of 16 meters by 12 meters, is surrounded by a road 3 meters wide. The area of the road is :
The width of a rectangular plot was reduced by 30% and the length was reduced by 10%. The size of the new plot is what percent of the original plot?
If one angle of a triangle is three times a second angle and the third is 20 degrees more than the second angle, the second angle, in degrees, is
If m men can paint a house in d days, how many days will it take m+2 men to paint the same house?
If 3x+2>2x+7, then x is
Which of the following is the largest?
If 89 and 125 is divided by a positive integer X, then the remainders are 4 and 6 respectively.
30
৪০
50
৬০
It costs Tk. 1000 to make the first thousand copies of a book and x taka to make each additional copies. If a total of 6000 copies were made with a total cost of Tk. 5500, what is X?
If x is 2/5 of y and y is 5/7 of z, what is the ratio of z : x?
If 3 tailors can make 60 shirts per day, how many days will it take 6 tailors to make 120 shirts?