১২০৭১
The respective ratio between the speed of a car, a train, and a bus is 5 : 9 : 4. The average speed of the car, bus and train is 72 km/hr together. What is the average speed of the car and the train together?
উত্তর
84 km/hr
১২০৭২
Three angles of a triangle are in proportion 5 : 6 : 7. Then what is the difference in degrees between he biggest and the smallest angles?
উত্তর
20°
১২০৭৩
A water tank has two taps (Tap-1 and Tap-2): Tap-1 can fill a tank in 8 hours and Tap- 2 can empty the tank in 16 hours. How long will they take to fill the tank if both taps are opened simultaneously but Tap-2 is closed after 8 hours?
উত্তর
12
১২০৭৪
The average of the three numbers x, y and z is 45, x is greater than the average of y and z by 9. The average of y and z is greater than y by 2. Then the difference of x and z is.
উত্তর
7
১২০৭৫
A can finish a work in 5 days and B takes 4 days to do the same work. If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together?
উত্তর
20 days
১২০৭৭
The sum of three consecutive multiples of 3 is 72. What is the largest number?
উত্তর
27
১২০৭৯
P and Q started a business investing Tk 85000 and Tk 15000 respectively. In what ratio the profit earned after 2 years be divided between P and Q respectively?
উত্তর
17 : 3
১২০৮০
A man riding his bicycle covers 150 meters in 25 seconds. What is his speed in km per hour?
উত্তর
21.6