Ques:- The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally ?
Recent Answer : Added by Vivek verma On 2021-08-25 14:15:38:
let no of boys in group is = x
then total sum = 30 * x
after joining one more boys with a weight of 35 kg the total sum is = 30x + 35
after joining the new student the weight will increase 1 kg
so total sum
30x + 35 = 31(x+1)
x = 4
Ques:- In a company 3/5 of people know shorthand 1/4th know typing and 1/5 know both. What fraction of people do not know both?
Recent Answer : Added by Admin On 2020-05-17 11:59:27:
4/5
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Ques:- A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened. What is the total time taken to fill the tank completely?
Recent Answer : Added by Deerroj On 2022-03-18 09:20:19:
I belive it is 3:45 hrmins
Ques:- A certain sum is invested at simple interest at 18% p.a. for two years instead of investing at 12% p.a. for the same time period. Therefore the interest received is more by Rs. 840. Find the sum?
Recent Answer : Added by Nikhil Ambigar On 2022-01-08 16:05:06:
let x be sum.
SI of 18% for 1 year= x*18/100=0.18x;
SI of 18% for 2 years is 0.36x;
SI of 12% for 1 year= x*12/100=0.12x;
SI of 12% for 2 years is 0.24x;
Given, 0.36x-0.24x=840
0.12x=840
x=840/0.12=7000.
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Recent Answer : Added by Naveen On 2021-08-11 19:02:50:
Grandfather
Ques:- Joe is fencing in a square area of 576 square feet. Fence posts, which are needed every three feet, cost 32.00 each. The fencing cost 4.50 per foot. What is the total cost of the fencing materials?
Recent Answer : Added by Vivek Bharadwaj On 2022-08-14 16:33:40:
Joe is fencing in a square area of 576 square feet.
Fence posts, which are needed every three feet, cost 32.00 each.
The fencing cost 4.50 per foot. What is the total cost of the fencing materials?
Solution:-
Area of Square is 576 sq ft.
so, the length of side = root(576) = 24 ft
Since the fencing would be done on the perimeter, we would need that
formula is 4*side = 96 ft.
Number of Fence post needed = 96/3 = 32
1 Fence post cost = 32
32 Fence Post cost = 32 * 32 = 1024
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Ques:- In which ratio must water be mixed with milk costing Rs. 12 per litre to obtain a mixture worth of Rs. 8 per litre?
A. 1 : 2
B. 2 : 1
C. 2 : 3
D. 3 : 2
Recent Answer : Added by Muhammad Adnan On 2022-03-09 16:41:05:
B
Ques:- One man want to build a wall .The length and breadth of the wall are 20 and 30 respectively. He needs 35 bricks for one square centimeter. How many bricks he need?
A. 21500
B. 30000
C. 21000
D. 20000
E. 25000
Recent Answer : Added by Admin On 2022-09-28 18:50:25:
C. 21000
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Ques:- In acolony there are some families. Each of them have children butdifferent in numbers.Following are conditions a> no of adult>no of sons>no of daughters>no of families. b>each sister must have atleast one brother and should have at the most 1 sister. c> no of children in one family exceeds the sum of no of children in the rest families. Tell the no of families?
Recent Answer : Added by Admin On 2020-05-17 11:59:49:
Three families
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Recent Answer : Added by Rahul On 2023-07-11 15:11:54:
By their Ability to suck dick.
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Recent Answer : Added by as On 2021-05-16 16:12:43:
brother and sister
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A. Blue
B. Red
C. Brown
D. White
E. Drink
Recent Answer : Added by Manga Ravikumar On 2022-03-09 16:45:58:
red
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Recent Answer : Added by usha On 2021-11-09 15:54:01:
16
Ques:- What do you feel has been your greatest work-related accomplishment?
let no of boys in group is = x
then total sum = 30 * x
after joining one more boys with a weight of 35 kg the total sum is = 30x + 35
after joining the new student the weight will increase 1 kg
so total sum
30x + 35 = 31(x+1)
x = 4