Maths

A mixture contains acid and water in the ratio of 7 : 4. If 2 liters of water is added to it, then the ratio of acid and water becomes 7 : 5. What is the quantity of acid in the mixture. a) 14 liters b) 7 liters c) 20 liters d) 21 liters Ans […]

Question : Radius of sphere is increased by 50 percent. What will be the percentage increase in its volume?प्रश्न: एक गोले की त्रिज्या 50 प्रतिशत बढ़ जाती है। इसकी आयतन मात्रा में कितने प्रतिशत की वृद्धि होगी? Answer: 3. 237.5 percent Solution:Volume = $ \frac 43 \pi r^3$r = Radius From above formula : volume

Two boys are standing on the opposite ends of 540 meters long bridge. If they start walking towards each others at same time at the speed of 18 meters/minutes and 12 meters/minutes respectively, then in how much time they meet each other? a) 18 minutesb) 14 minutesc) 26 minutesd) 32 minutes Ans : a) 18

If the cost of an article is 80 percentage of its selling price, then what is the profit percentage? a) 20 percentageb) 30 percentagec) 35 percentaged) 25 percentage Ans : SSC GD – 30/03/2024 Shift -1 Step 1: Define the variables. Step 2: Calculate the profit. Profit is the difference between the selling price and

Question: 25 percent of 20 percent of a number is equal to 250. What is the 35 percent of that number? Answer: 1750 Solution: 25 percent of 20 percent of a number x = 2500.25(0.2)x=25035 percent of the number =0.35×0.35x= (250x4x5x35)/100=5x2x5x35=1750

Question: Swapnil can build a sofa in 16 days. Working together with Revathi he can finish the work in 129/17 days. Find the number of days taken by Revathi to complete the work if she works alone. Answer: 4. 128/9 days Solution:building a sofa workdone = wSwapnil can do in 16 days = w=16ss=speed of

Question: Rs. 9000 is lent at the rate of 80 percent per annum on compound interest (compounded half yearly). what will be the compound interest of 12 months? Answer: Rs. 8640 Solution:interest= PXRXT/100Compound interest be x(9000(0.5)(0.8)+ 9000(1+0.5(0.8))(0.8)(0.5))/1003600+5040Rs 8640

Question: The product of two numbers is 720 and their Highest common factor is 4. What is the Least common multiplier of these numbers? Answer: 3. 180 Solution: product of two numbers= HCF X LCM720= 4 LCMLCM= 180

Question: IF 45 percent of X is equal to 15 percent of Y, then what is the value of X:Y? Answer: 4. 1:3 Solution: 0.45x=0.15y3x=yx:y=1:3

Question: A student scores 75% in a test and gets 30 marks more than another student who secured 60%. What is the maximum marks in the test? Answer: 200 Solution: x is total marks . Then equation becomes0.75x=0.6x +300.15 x=30x=200