Ques:- The perimeter of a semi circle is 144 cm then the radius is?
Recent Answer : Added by Admin On 2022-09-29 17:59:35:
Perimeter of semi circular = πr+2r
Where r is radius , π = 22/7
πr+2r= 144 (given)
(22/7)r +2r = 144
22r+14r = 144*7 (multiply both sides by 7)
36r = 144*7
r= 144*7/36 = 28
radius =28 cm
Area =( 1/2)πr^2
Area=( 1/2 )*(22/7)*28*28
= 1232cm^2
Ans : area is 1232 cm^2
Ques:- 3978 + 112 x 2 = ? ? 2
Recent Answer : Added by Admin On 2020-05-17 12:03:32:
( d ) 8404
Ques:- A 1 Km wire is connected between N poles. If 1 pole is removed the distance between the pole increases by 2/3 of the original distance. How many poles are there?
Ques:- A part of certain sum of money is invested at 9% per annum and the rest at 12% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?
Recent Answer : Added by uma On 2022-02-20 07:56:22:
3;4
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Recent Answer : Added by Nandini Gupta On 2021-10-22 09:12:36:
810
Ques:- How many degrees (if any) are there in the angle between the hour and minute hands of a clock when the time is a quarter past three?
Recent Answer : Added by pooja Jawade On 2021-11-25 15:47:56:
22.5
Ques:- A started a business with an investment of Rs. 70000 and after 6 months B joined him investing Rs. 120000. If the profit at the end of a year is Rs. 52000, then the share of B is?
Recent Answer : Added by Abi On 2021-07-19 18:31:47:
24000
Ques:- A cube of side 4cm is painted with colors red,blue,green in such a way that opposite sides are painted in the same colour . this cube is now cut into 64 cubes of equal size .then 1) how many have atleast two sides painted in different colours.2) how many cubes have only one side painted.3) how many cubes have no side painted4) how many have exactly one side not painted.
Ques:- Two varieties of wheat – A and B costing Rs. 9 per kg and Rs. 15 per kg were mixed in the ratio 3 : 7. If 5 kg of the mixture is sold at 25% profit, find the profit made?
Recent Answer : Added by Mohamed Raja M On 2022-04-02 07:00:53:
answer = 16.5Rs
A=3*9=27Rs
B=7*15=105Rs
132 R for 10 kg
therefore,
1kg amount = 132/10=13.2 so,
5kg mixture price = 13.2*5=66Rs
mixture will sell 25%profit then the price =66*(25/10)=33/2=16.5Rs
Ques:- Bird is flying 120km/hr b/w B to R. two trians at B to R at 60 kmph .The distance trvelled by the bird before it is killed.
Recent Answer : Added by Admin On 2020-05-17 12:01:17:
120
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Ques:- Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odd or both prime is?
Recent Answer : Added by MAMIDI LIJITA SREE On 2023-01-21 17:36:45:
The answer cannot be determined as there is a particular formula where the consecutive numbers start.
Ques:- The inverse ratio of 3: 2: 1 is?
Recent Answer : Added by DK On 2022-03-09 16:28:53:
Ratio is 3:2:1
Total=6
Reverse of ratio is 1/3:1/2:1/1
Portion of first part is=1/3*6=>2
Portion of second part is=1/2*6=>3
Portion of third part is 1*6=>6
∴So the new ratio is 2:3:6
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Ques:- In a certain company 20% of the men and 40% of the women attended the annual company picnic. If 35% of all the employees are men .What % of all the employee went to the picnic?
Recent Answer : Added by Admin On 2022-09-29 17:55:57:
Suppose that total 100 employees are in company….. out of that 35 are man and remaining 65 are women.
20% of man 35 = 20*35/100
40% of women = 40*65/100
total employees = 7+26 = 33 out of 100
so, Ans = 33 %
Ques:- M men agree to purchase a gift for Rs. D. If three men drop out how much more will each have to contribute towards the purchase of the gift/A. D/(M-3)B. MD/3C. M/(D-3)D. 3D/(M2-3M)
Ques:- a merchant surveyed 400 ppl.180 learned abt the sale of radio,190 from TV,190 from newspaper,80 from radio and TV,90 from radio and newspapers,50 from TV and newspapers,30 from all the three sources.draw a venn diagram n explain how many learnt
A. newspapers or radio, but not from both?
B. only from newspapaers?
C. from radio or television but not the newspaper?
D. from radio and television but not the newspaper?
E. from atleast two of the three media?
Ques:- In a game of billiards, A can give B 20 points in 60 and he can give C 30 points in 60. How many points can B give C in a game of 100?
Recent Answer : Added by Sanjay kumar On 2021-08-28 11:27:11:
50
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Ques:- If the side of a square is increased by 25% what will be the percentage increase in the area?
Recent Answer : Added by Muhammad Azeem Sheikh On 2022-09-02 17:03:42:
56.25 % is the right answer.
area of square = side ^ 2
at first, it was 100% , means 1
then, a side was enlarged to 25%, means now, 125% means new side is 1.25
taking square will give 1.5625
1.5625 – 1 = 0.5625
so, 56.25% increment in area.
Perimeter of semi circular = πr+2r
Where r is radius , π = 22/7
πr+2r= 144 (given)
(22/7)r +2r = 144
22r+14r = 144*7 (multiply both sides by 7)
36r = 144*7
r= 144*7/36 = 28
radius =28 cm
Area =( 1/2)πr^2
Area=( 1/2 )*(22/7)*28*28
= 1232cm^2
Ans : area is 1232 cm^2