A and B can together complete a piece of work in 4 days . If A alone can complete the same work in 12 days, in how many days can B alone complete that work?
(8.97)2×(15.05)2÷ 624.89=9n then the value of n is -
How many seconds will a 500 m long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train , if the speed of the train is 63 km / hr?
A lent TK. 5000 to B for 2 years and TK. 3000 to C for 4 years on simple interest at the same from both of them as interest . The rate of interest per annum is :
Nikki is 25% more efficient that Tina. Tina alone can build a craft in 20 days. Find the number of days taken by Nikki to finish the same piece of work ?
A man can reach a certain place in 49 hours. If he reduces his speed by 1/15th , he goes 5 km less in that time. Find the total distance covered by him .
A man takes twice as long to row a distance against the stream as to row the same distance in favor of the stream . The ratio of the speed of the boat (in still water ) and the stream is :
A, B and C investment in a partnership in the ratio of 5 : 6 : 8. The ratio of their profit is 5 : 3 : 12. Find the ratio of time for their investment ?
A shopkeeper marks the price of an article at TK. 80. What will be the selling price. if he allows two successive discounts of 5% each ?
If 2n=64 ,what will be the value of n?
If 1/5 : 1/N /1.25 , then the value of N is?
How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random . What is the probability of getting a prize ?
A rectangular block 6 cm by 12 cm 15 cm is cut up into an exact number of equal cubes. Find the least possible number of cubes.
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?
16 cm
24 cm
20 cm
18 cm
The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m , then its area is :
A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened . What is the total time taken to fill the tank completely?
For any two numbers m, n; (m+n) : (m-n): mn=7 :1 : 60. Find the value of 1/m : 1/n
The sum of three numbers is 98. If the ratio of the first to the second is 2 : 3 . And that of the second to the third is 5 : 8 , then the second number is -
0.01+0.0064=?
If 20% of a =b, then b% of 20 is the same as:
Two buses start at the same time from Delhi and Agra, which are 300 km apart, towards each other. After what time will they cross each other, if their speeds are 38 km per hour and 37 km per hour?
Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart , is :