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If four times of certain number ‘a’ is ten more than thrice the number then the equation derived for this statement can be written as ____ ?
A. 4a = 3a – 10
B. 4a = 3a + 10
C. 3a = 4a + 10
D. 3a = 4a – 10A 9% stock yields 8%. The market value of the stock is ?
A. Rs. 112.50
B. Rs. 90
C. Rs. 72
D. Rs. 116.50To get Rs. 9, investment = Rs. 100/8 * 9 = Rs. 112.50.
Market value of Rs. 100 stock = Rs. 112.50.
A man invested Rs. 1552 in a stock at 97 to obtain an income of Rs. 128. The dividend from the stock is ?
A. 9.70%
B. 3.90%
C. 8%
D. 7.50%By investing Rs. 1552, income = Rs. 128. By investing Rs. 97, income = Rs.( 128/1552 X 97 ) = Rs. 8. So Dividend = 8%
In order to obtain an income of Rs. 650 from 10% stock at Rs. ,96, one must make an investment of ?
A. Rs. 6240
B. Rs. 9600
C. Rs. 3100
D. Rs. 6500Surface area of a sphere is 2464 cm2. If its radius is doubled, then the surface area of ?
A. 4727 cm2
B. 19712 cm2
C. 4920 cm2
D. 9856 cm2A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in ?
A. 110 days
B. 50 days
C. 20 days
D. 30 days2 men and 12 women can finish a job in 4 days. 4 men and 6 women can do the same job in 5 days. Find the time taken by 1 man and 1 woman to complete the job ?
A. 20 days
B. 24 days
C. 30 days
D. 25 daysA alone can finish a work in 10 days and B alone can do it in 15 days. If they work together and finish, then out of a total wages of Rs.75. A will get ?
A. 45 Rs.
B. 40 Rs.
C. 35 Rs.
D. None of themTo fill a cistern, pipes P, Q & R take 20, 15 & 12 minutes respectively. The time in minutes that the three pipes together will take to fill the cistern is ?
A. 20 min
B. 5 min
C. 10 min
D. 15 min6 men and 8 women can complete a work in 10 days. 26 men and 48 women can finish the same work in 2 days. 15 men and 20 women can do the same work in ____ days ?
A. 12 days
B. 7 days
C. 4 days
D. 6 daysWork done by 6 men and 8 women in 1 day = 1/10
=> 6m + 8b = 1/10
=> 60m + 80b = 1 — (1)
Work done by 26 men and 48 women in 1 day = 1/2
=> 26m + 48b = ½
=> 52m + 96b = 1— (2)
Solving equation 1 and equation 2. We get m = 1/100 and b = 1/200
Work done by 15 men and 20 women in 1 day
= 15/100 + 20/200 =1/4
=> Time taken by 15 men and 20 women in doing the work = 4 days