Speed of a boat in still water is 9 km/hr. It goes 12 km down stream and comes back to the starting point in three hours.What is the speed of water in the stream?
A student was asked to add 16 and subtract 10 from a number.He by mistake added 10 subtracted 16. If his answer is 14 what is the correct answer?
Find the area of a right angled triangle whose hypotenuse is 10 cm and base 8 cm.
Find the next term of the series: 3, 6, 9, 18, 27, 54, ……
A number consists of 20 plus 20% of its value. The number is:
20% of 5 + 5% of 20 =