A man can row downstream at 10 kmph and upstream at 5 kmph. The man's rowing rate in still water is ----
If the circumference of a circle is increased by 50%, its area will be increased by :
The diameter of a wheel is 63 cm. Distance traveled by the wheel in 100 revolutions is ----
0.777777/0.011=?
The arithmetic mean of the set of observations 1, 2, 3, --------n is -----
A number consists of two digits, whose sum is 10. If 18 is subtracted from the number, digits are reversed. The number is ----
If 15 men can reap a field in 35 days, in how many days will 21 men reap the field?