Ques:- X, Y and Z can do a piece of work in 24, 30 and 40 days respectively. They start the work together but Z leaves 4 days before the completion of the work. In how many days is the work done?
Ques:- Your fab sub, project work during education?
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Ques:- If a: b = 3:4, b:c = 7:9, c:d = 5:7, Evaluate a:d?
Recent Answer : :
3:7
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Ques:- A train 240 m long passed a pole in 24 seconds. How long will it take to pass a platform 650 m long?
A. 65 sec
B. 79 sec
C. 89 sec
D. 99 sec
Recent Answer : :
240-24
650-?
?=24*650/240
65SEC
Ques:- Finish the series : 5,6,7,8,10,11,14,..?
Recent Answer : :
In the given series 5,6,7,8,10,11,14…
There are two series
First is 5,7,10,14…
Second is 6,8,11….
First series
5+2=7
7+3=10
10+4=14
Second series
6+2=8
8+3=11
11+4=15
Hence complete series is 5,6,7,8,10,11,14,15…
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Ques:- A can do a piece of work in 15 days and B in 20 days. They began the work together but 5 days before the completion of the work, A leaves. The work was completed in?
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Ques:- Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?
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Ques:- 21 mango trees, 42 apple trees and 56 orange trees have to be planted in rows such that each row contains the same number of tress of one variety only. Minimum number of rows in which the trees may be planted is
A. 2
B. 5
C. 12
D. 17
Recent Answer : :
d
Ques:- A train passes two cars moving in the direction at 45km/hr and 50km/hr in 36 sec and 54 sec respectively. What is the length of the train?
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Ques:- Ramu rides his bike at an average speed of 45 km/hr and reaches his desitination in four hours. Somu covers the same distance in six hours. If Ramu covered his journey at an average speed which was 9 km/hr less and Somu covered his journey at an average speed which was 10 km/hr more, then the difference in their times taken to reach the destination would be (in minutes).
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Ques:- There are 50 families in a village each consisting of a husband and a wife. Each woman knows all the men who are thieves except her husband. Now the king announces that there is at least one thief in the village. What happens then?
Ques:- A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 650 m long?
Recent Answer : :
From the first statement
Speed=distance/time
=>240/24=10m/s
so speed=10m/s
From the second statement
distance=length of the platform+length of the train=650+240=890m
Time=distance/speed
here, the speed of the train is already calculated
=>890/10=89s
So the time taken by the train to cross the platform is 89 seconds
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Ques:- E.g. of showing initiative
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Ques:- The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
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Ques:- You have 9 marbles. 8 marbles weigh 1 ounce each, & one marble weighs 1.5 ounces. You are unable to determine which is the heavier marble by looking at them. You have a weighing scale that consists of 2 pans, but the scale is only good for 2 total weighing. How can you determine which marble is the heaviest one using the scale & in 2 weighing?
One day’s work of A, B and C = (1/24 + 1/30 + 1/40) = 1/10.
C leaves 4 days before completion of the work, which means only A and B work during the last 4 days.
Work done by A and B together in the last 4 days = 4 (1/24 + 1/30) = 3/10.
Remaining Work = 7/10, which was done by A,B and C in the initial number of days.
Number of days required for this initial work = 7 days.
Thus, the total numbers of days required = 4 + 7 = 11 days.