Maths

The marked price of a chair is 10 percent more than its cost price. If the chair is sold for Rs 132 after a discount of Rs 11, then what will be the profit percentage? a) 1.53 percentb) 1.78 percentc) 2 percentd) 1.21 percent Ans : a) 1.53 percent SSC Constable GD Paper 21 Feb […]

Question: What is the curved surface area of a cylinder having radius of base as 70 cm and height 14 cm ? Answer: 1. 6160 Solutions: csa=2(3.14)r X h=6154 nearest answer 6160

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

Question: Find the value of (7+33)x(44/2)x(5×5). Answer: 2. 22000 Solution: (7+33)x(44/2)x(5×5)According to BODMAS rule(40)x(22)x(25)22000

Question: Selling price of a table is Rs. 6875. If profit percentage is 25 percent, then what is the cost price of table? Answer: 2. Rs. 5500 Solution: s= Rs. 6875 cost price be cc+0.25c=1.25c=s=6875c= Rs. 5500

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