Ques:- A pipe fill a tank in 3hrs.another pipe fill that same tankin 2hrs.if both pipe inserted in tank to fill it how timw itwill take to fill?
Recent Answer : Added by MUGILARASU On 2022-09-15 16:39:02:
consider the tank capacity as 90 litres.
to fill the tank in 3 hrs first pipe must flow at a rate of 30 litres/hr
2nd pipe has to flow at a rate of 45 litres/hr
if two pipes are opened at a time the flow rate will become 75 litres/hr
90/75= 6/5 = 1.2= (i.e) 1hr and 12 minutes 1 1/5 hr
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Ques:- What is the sum of all numbers between 100 and 1000 which are divisible by 14 ?
Recent Answer : Added by Kalyani Nanaware On 2022-08-14 16:43:06:
The numbers that lie between 100 and 1000 which are divisible by 14 are 112, 126,140 …,994
a = 112; l = 994, d = 14
n= (l−a)/d+1
= (994-112)/14+1
= 64
Sn=n/2(l+a)
= 64/2(994+112)
= 32*1106
= 35392
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Ques:- 10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
Recent Answer : Added by Mahomed On 2021-08-24 15:05:46:
All books can be arranged in 10! ways. A single pair of books can be taken as a unit and arranged among the 8 others in 9! ways. The pair of books can also be interchanged and therefore rearranged in 2! ways. Thus the probability of the pair always being together is (9!*2!)/10!
Ques:- If a vessel contains 56 lit of a mixture of milk and water in ratio3:2.what amount of the water should be added to make the ratio 4:5 ?
Ques:- In how many years does a sum of Rs. 5000 yield a simple interest of Rs. 16500 at 15% p.a.?
Recent Answer : Added by Karthiga On 2022-03-09 16:30:43:
Given:
Principle Amount(P):₹5000
S.I:₹16500
Rate of Interest(R):15%
Find:T
SI=P*T*R/100
T=SI*100/P*R
T=16500*100/5000*15
T=22 YEARS
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Ques:- If a passenger train takes twice to cross a freight train to overtake than to cross each other in opposite direction find how many times faster is passenger train than the freight train
Recent Answer : Added by Admin On 2020-05-17 12:01:07:
TWICE
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Ques:- In a certain code language DESERT is written RTSEDE. How will the word FAULTS the written in that code language?
A. TSULFA
B. AFLUST
C. LUAFST
D. UAFSTL
E. None of these
Recent Answer : Added by Princess Sakura On 2022-03-09 16:33:21:
It’s choice A because you take the last to letters and move them to the front then the previous two letters go after them and so on.
Ques:- A rectangular field has area equal to 150 sq m and perimeter 50 m. Its length and breadth must be?
Recent Answer : Added by polo On 2020-11-19 16:12:30:
b=15,l=10 or b=10,l=15
Ques:- How many numbers up to 500 are divisible by 23?
Recent Answer : Added by pooja Jawade On 2021-11-25 15:47:47:
21
Ques:- A sum of Rs. 390 was divided among 450 boys and girls. Each girl gets 50 paise and each boy gets one rupee. How many girls are there among them?
A. 100
B. 110
C. 120
D. 130
Recent Answer : Added by Avinash Kumar On 2022-04-02 07:00:09:
120
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Ques:- Find the simple interest on Rs.500 for 9 months at 6 paisa per month?
Recent Answer : Added by Shravan On 2021-08-04 15:54:04:
Answer:270
Explanation: Formula is SI= P*R*T/100
Where P is principal amount
R is Rate
T is Time
So, SI= 500*6*9/100
i.e SI= 27000/100
SI= 270
Ques:- The volumes of two cubes are in the ratio 27: 125, Evaluate the ratio of their surface areas?
Recent Answer : Added by Manavpreet kaur On 2022-03-13 16:35:20:
9
9/25
Ques:- A positive number when decreased by 2 is equal to 15 times the reciprocal of the number. What is the number ?
Recent Answer : Added by Abhi Chatterjee On 2022-01-08 16:05:35:
Let the number be x.
So x-2 =15/x, or
x^2–2x-15=0, or
(x-5)(x+3)=0
Hence x = 5 or -3.
Check: When x=5, 5–2=3 which is 15/5=3.
When x=-3, -3–2=-5 which is 15/-3=-5.
The number is 5 or -3.
Ques:- The minute and the hour hand of a watch meet every 65 minutes. How much does the watch lose or gain time and by how much?
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Ques:- A sample of milk contains 5% water. What quantity of pure milk should be added to 10 litres of milk to reduce the water content to 2%? (a) 5 litres (b) 7 litres (c) 15 litres (d) 12 litres (e) None of these
Recent Answer : Added by Admin On 2020-05-17 12:03:55:
( c ) 15 litres
Ques:- A car started running at a speed of 30 km/hr and the speed of the car was increased by 2 km/hr at the end of every hour. Find the total distance covered by the car in the first 10 hours of the journey.
Recent Answer : Added by Admin On 2022-09-29 18:44:47:
30+32+34+36+38+40+42+44+46+48=390..
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Ques:- A, B and C contract a work for Rs. 550. Together A and B aresupposed to do 7/11th of the work. How much does C get?
Recent Answer : Added by Admin On 2020-05-17 12:03:59:
let the total work to be done =1
so a+b+c=1 (say)
then a and b are supposed to do 7/11 th of work
so c= 1- (7/11)
c=4/11
therefore c gets (4/11)*550
=200 is the answer
consider the tank capacity as 90 litres.
to fill the tank in 3 hrs first pipe must flow at a rate of 30 litres/hr
2nd pipe has to flow at a rate of 45 litres/hr
if two pipes are opened at a time the flow rate will become 75 litres/hr
90/75= 6/5 = 1.2= (i.e) 1hr and 12 minutes 1 1/5 hr