A. 300
B. 200
C. 250
D. 350
✅ The correct answer is option C. 250.
128. 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___________?
A. 8 days
B. 10 days
C. 12 days
D. 15 days
✅ The correct answer is option C. 12 days.
(A.+ B)’s 1 day’s work = ( 1/15 + 1/10 ) = 1/6 Work done by A and B in 2 days = ( 1/6 X 2 ) = 1/3 Remaining work = ( 1 – 1/6 ) = 2/3
(A.+ B)’s 1 day’s work = ( 1/15 + 1/10 ) = 1/6 Work done by A and B in 2 days = ( 1/6 X 2 ) = 1/3 Remaining work = ( 1 – 1/6 ) = 2/3
Now, 1/15 work is done by A in 1 day. so 2/3 work will be done by A in ( 15 X 2/3 ) = 10 days Hence, total time taken = (10 + 2) = 12 days.
126. A garrison has provision for 30 days for certain men. If 2/3 of them do not attend the mess then the food will last for?
A. 50 days
B. 90 days
C. 65 days
D. 55 days
✅ The correct answer is option B. 90 days.
A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?
A. 70
B. 50
C. 40
D. 60
✅ The correct answer is option D. 60.
Amount of work done by A and B in 1 day = 1/30
Amount of work done by A and B in 1 day = 1/30
Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?
A. Rs.17684
B. Rs.1684
C. Rs.2522
D. Rs.3408
✅ The correct answer is option C. Rs.2522.
120. A car is running at a speed of 108 kmph. What distance will it cover in 15 seconds ?
A. 45 metres
B. 55 metres
C. 450 metres
D. Cannot be determined
✅ The correct answer is option C. 450 metres.
118. A man could buy a certain number of notebooks for Rs.300. If each notebook cost is Rs.5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook?
A. 10
B. 8
C. 15
D. 7.50
✅ The correct answer is option A. 10.
The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?
A. 17 kg
B. 20 kg
C. 26 kg
D. 31 kg
✅ The correct answer is option D. 31 kg.
151. In what ratio must a grocer mix teas worth Rs.60 a kg and Rs.65 a kg.So that by selling the mixture at Rs. 68.20 a kg, He may gain 10%?
A. 3:2
B. 3:4
C. 3:5
D. 4:5
✅ The correct answer is option A. 3:2.
What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years ?
A. 1 : 3
B. 1 : 4
C. 2 : 3
D. Data inadequate
✅ The correct answer is option C. 2 : 3.
Let the principal be P and rate of interest be R%. So Required ratio = [(P x R x 6/100) / (13 x R x 9/100)] = 6PR/9PR = 6/9 = 2 : 3
Let the principal be P and rate of interest be R%. So Required ratio = [(P x R x 6/100) / (13 x R x 9/100)] = 6PR/9PR = 6/9 = 2 : 3