1.Two pipes can fill a cistern in 3 hours and 4 hours respectively and a waste pipe can empty it in 2 hours. If all the three pipes are kept open. Then the cistern will be filled in :
(1) 5 hours
(2) 8 hours
(3) 10 hours
(4) 12 hours
2.A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days, B had to leave and A alone completed the remaining work. The whole work was completed in :
(1) 10 days
(2) 8 days
(3) 12 days
(4) 15 days
3.An article is sold at a profit of 20%. If it had been sold at a profit of 25%, it would have fetched Rs. 35 more. The cost price of the article is :
(1) Rs. 650
(2) Rs. 700
(3) Rs. 750
(4) Rs. 800
4.A tradesman sold an article at a loss of 20%. If the selling price had been increased by Rs. 100, there would have been a gain of 5%. The cost price of the article was :
(1) Rs. 200
(2) Rs. 25
(3) Rs. 400
(4) Rs. 250
5.If the ratio of areas of two squares is 225 : 256, then the ratio of their perimeters is :
(1) 225 : 256
(2) 256 : 225
(3) 15 : 16
(4) 16 : 15
6.The percentage increase in the area of a rectangle, if each of its sides is increased by 20%, is :
(1) 40%
(2) 42%
(3) 44%
(4) 46%
7.A number is increased by 20% and then again by 20%. By what per cent should the increased number be reduced so as to get back the original number?
(1) 30(5/9)%
(2) 19(11/31)%
(3) 40%
(4) 44%
8.A boy, after giving away 80% of his pocket money to one companion and 6% of the remainder to another, has 47 paise left with him. How much pocket money did the boy have in the beginning?
(1) Rs. 2
(2) Rs. 2.50
(3) Rs. 5
(4) Rs. 10
9.If the compound interest on a sum for 2 years at 12(1/2)% per annum is Rs. 510, the simple interest on the same sum at the same rate for the same period of time is :
(1) Rs. 400
(2) Rs. 480
(3) Rs. 450
(4) Rs. 460
10.5 persons can prepare an admission list in 8 days working 7 hours a day. If 2 persons join them so as to complete the work in 4 days, they need to work per day for :
(1) 10 hours
(2) 9 hours
(3) 12 hours
(4) 8 hours
Note : Answers will be updated soon................
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