28 km/hr
23 km/hr
20 km/hr
16 km/hr
The speed of a motor boat itself is 20 km/h and the rate of flow of the river is 4 km/h. Moving with the stream the boat went 120 km. What distance will the boat cover during the same time going against the stream?
The speed of a motor-boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 minutes. It will come back in:
The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.
The square of a number greater than 1000 that is not divisible by three, when divided by three, leaves a remainder of
The square of a positive number is 2000% greater than the number itself, then the square of that number is :
The square root of ((10 + √25)(12 - √49)) is
The sum of ages of 4 children born at intervals of 4 years each is 60. What is the age of the youngest child?
The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?
The sum of ages of three persons A, B and C together is 167 years. B is 17/12 times as old as A, and C is 44 years older than A. What is the age of B?
The sum of all integers between 200 and 400 divisible by 9 is
