- Work done by A in one day is four times the work done by B in one day, while the work done by B in one day is one-third of the work done by C in one day. C alone can complete the work in 16 days. In how many days can all the three together complete the work?
4 days7 days9 days6 days8 daysOption D
C = 16 days
B = 3*16 = 48 days
A = 48/4 = 12 days
All of them = 1/[1/16+1/48+1/12] = 6 days - Three numbers are A,B and C are in the ratio 1:2:3 and their average is 600.if A is increases by 10% and B is decrease by 20%,then the average increased by 5%, C will be increase by ?
180171162150177Option A
sum of A, B and C = 600 × 3 = 1800
A = 300, B = 600, C = 900
Now A = 330, B = 480
Average = 630 630 × 3 = 330 + 480 + C
C = 1080
C will be increased by 180 - Suhas decided to donate 15% of his salary. On the day of donation he changed his mind and donated Rs.1,650 which was 11/15th of what he had decided to donate earlier. How much is Suhas’ salary?
Rs.1600Rs.1300Rs.1500Rs.1200Rs.1000Option C
11/15*15/100*x = 1650
=>x = Rs.1500 - A tap can empty a tank in one hour. A second tap can empty it in 30 min. If both the taps operate simultaneously, how much time is needed to empty the tank?
50 min.10 min.40 min.30 min.20 min.Option E
Required time = 1/[1/60+1/30] = 20 min. - A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for
40 months10 months70 months50 months30 monthsOption B
Let initial investments be 5x and 7x.
Let B invested money for months y months (5x+7)/(7x*y) = ½
=>y = 10 months - 7802 + 132 − 8963 + 1326 =?×33
58946Option C
7802 + 132 − 8963 + 1326 =?×33
=>9260 – 8963 = ? × 33
=>? = 297/33 = 9 - 21.9% of 650 = ? + 23.12
115111112110119Option E
21.9% of 650 = ? + 23.12 =>142.35 = ? + 23.12
=>? = 119.23 == 119 - 14.5% of 740 – ?% of 320 = 87.3
98654Option C
14.5% of 740 – ?% of 320 = 87.3
=> 107.3 – 87.3 = ?/ 100 ×320
=>? = 20×100/320 = 6.25 == 6 - 85% of 420 + ?% of 1080 = 735
3230313536Option D
85% of 420 + ?% of 1080 = 735
=>85/ 100 ×420 + 𝑥/100 ×1080 = 735
=> x = 35 - 30% of 1225 – 64% of 555 = ?
1810161412Option E
30% of 1225 – 64% of 555 = ?
=>? = 367.5 – 355.2 = 12.3 ==12
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