There are two pipes leading to a tank. The A pipe fills the tank in 7 minutes and the B pipe in 21 minutes. Both pipes are opened together. After some time, the pipe A is closed. If it takes 12 minutes to fill tank completely, then for how long is the B pipe alone open?
There are two pipes leading to a tank. If pipe X alone is opened, the tank will be filled in 20 minutes. If pipe Y alone is opened, the tank will be filled in 25 minutes. Both pipes were opened together. After some time, pipe Y was closed. If it takes 15 minutes to fill the tank completely, then for how long is the pipe X left open
There are two pipes leading to a tank. If pipe X alone is opened, the tank will be filled in 20 minutes. If pipe Y alone is opened, the tank will be filled in 25 minutes. Both pipes were opened together. After 5 minutes, pipe Y was closed. How long should pipe Y be left open to fill the rest of the tank?
In a certain code language, 'TEDI' is coded as '11' and 'SUCBVO' is coded as '13'. How is
'YXJIAZL' coded in the given language?
What will come in the place of the question mark (?) in the following equation, if "+' and
'-' are interchanged and 'x' and '÷' are interchanged?
18 ÷ 5 + 26 - 45 x 5 = ?
ഒരു കുപ്പി വെള്ളത്തിന്റെ വില 25 രൂപയാണ്. അതിൽ കുപ്പിയുടെയും വെള്ളത്തിന്റെയും വില ഉൾപ്പെടുന്നു. കുപ്പിയേക്കാൾ 15 രൂപ കൂടുതൽ ആണ് വെള്ളത്തിന്. വെള്ളത്തിന്റെ വില എത്ര ?
ഒരു കുപ്പി വെള്ളത്തിന്റെ വില 25 രൂപയാണ്. അതിൽ കുപ്പിയുടെയും വെള്ളത്തിന്റെയും വില ഉൾപ്പെടുന്നു. കുപ്പിയേക്കാൾ 15 രൂപ കൂടുതൽ ആണ് വെള്ളത്തിന്. കുപ്പിയുടെ വില എത്ര?
അച്ഛന്റെയും മകന്റെയും വയസുകളുടെ തുക 85 ആണ് അച്ഛനെക്കാൾ 27 വയസ്സ് കുറവാണു മകന് എങ്കിൽ മകന്റെ വയസ്സെത്ര ?
അച്ഛന്റെയും മകന്റെയും വയസുകളുടെ തുക 85 ആണ് അച്ഛനെക്കാൾ 27 വയസ്സ് കുറവാണു മകന് എങ്കിൽ അച്ഛന്റെ വയസ്സെത്ര ?
The HCF of two numbers is 11 and their sum is 132. If poth the numbers are greater than 42, then the difference between the two numbers is :
Vipul invests a sum of INR 5400 and Vijay invests a sum of INR 9400 at the same rate of simple interest per annum.If, at the end of 5 years , Vijay gets INR 840 more interest than Vipul, then find the rate of interest per annum. (in percentage).
A man goes to Ahmedabad from Kolkata at a speed of 9km/hr and returns to Kolkata at speed of 18km/hr, through same route. What is his average speed (in km/hr) of the entire journey?
A student was getting the following four offers on the purchase of a book:
I - Two successive discounts of 20% and 20%
Il - Two successive discounts of 25% and 15%
Ill - Two successive discounts of 30% and 10%
IV - Two successive discounts of 5% and 35%
Which scheme offers the most discount to the student?
The average wight of Gopal, Akshay and Athul is 46kg. If the average weight of Gopal and Akshay be 40 kg and that of Akshay and Athul be 45 kg. Then the weight of Akshay (in kg) is :
A dishonest shopkeeper promises to sells his goods at cost price. However he uses a weight that actually weighs 46% less than what is written on it.Find the profit.
Two cones have their heights in the ratio 4:3 and the radii of their bases in the ratio 1:2. Find the ratio of their volumes.
A can do a piece of work in 32 days and B in 48 days. They work together for 8 days and then A goes away.In how much time (in days) will B finish the 60% of the remaining work?
The price (per litre) of petrol increases by 85%. By what percent should its consumption be reduced such that the expenditure on it increase by 48% only ?
Two trains having lengths of 210m and 140m are running at speed of 80 km/h and 150 km/h respectively, in the same direction. The time taken (in minutes) by the faster train, coming from behind, to completely cross the other train is :
Two numbers are in the ratio 4:9, If the mean proportional between them is 24, Find. the positive difference between the two numbers.
Mandar has two grandsons Ketan and Tushar. 11 years old Ketan gets some money From Mandar's wealth and 12 year old Tushar gets the rest of the money.But Ketan and Tushar will get the money only when they tunrs 22 years old. Till then the money is in a bank getting interest at rate 8% compounded annually. When both turn 22, they receive the same amount. How much had Mandar given Tushar (in INR) initially, If total money with Mandar was INR 24700?
If at same rate of interest , in 2 years the simple interest is INR 42 and compound interest is INR 51, Then what is the principal (in INR) ?
A number is first decreased by 15% and then increased by 20%. The number so obtained is 78 more than the original number. The original number is :
In an examination there where 3 papers of Mathematics , two papers of english and one paper of science. All papers where of 100 marks. S got 60% in Mathematics , 70% in English and 50% in Science. What was the percentage of marks in all papers ?
What will come in the place of question mark (?) in the following equation , if '÷' and 'x' are interchanged and '+' and '-' are interchanged ? 50 - 9 ÷ 1 + 63 x 7 = ?
Which is learning strategy that can be used to give direct experience to the children associated with Mathematics in various work place ?