Ques:- LCM and HCF of two numbers are 48 and 8 respectively. If one of the numbers is 16, the second number is
A. 36
B. 24
C. 18
D. 12
Recent Answer : Added by MONICA On 2021-11-22 17:29:35:
ANS = 24.
16 = 2^4
24 = 2^3 x 3
H.C.F of 16 and 24 = 8
L.C.M will be 48
Ques:- Find (7x + 4y ) / (x-2y) if x/2y = 3/2 ?
A. 6
B. 8
C. 7
D. data insufficient
Recent Answer : Added by DK BOSS On 2021-07-15 08:19:28:
x/2y=3/2…
therefore
2x=6y
x=3y
therefor
=21y+4y/3y-2y
=25y/y
=25..
there answer=25
so for the above question, we don’t have an option…so answer
is Data Insufficient..
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Ques:- If a 200 m long train crosses a platform of the same length as that of the train in 20 seconds, then the speed of the train is
A. 50 km/hr
B. 60 km/hr
C. 70 km/hr
D. 72 km/hr
Recent Answer : Added by Dhiya On 2023-05-31 17:27:59:
3600 sec in 1 hr.. 1000 M in 1 km so to covert m/s to km /hr you multiply the value with (3000/1000) .. so 3000 divided by 1000 will give you 18/5 it’s like constant value.. to convert m/s to km/ hr we can use this 18/5.. hope you understand
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Recent Answer : Added by Admin On 2020-05-17 11:59:42:
99/1020
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Recent Answer : Added by S.kowsalya On 2022-05-17 09:07:50:
94
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Recent Answer : Added by Grace On 2020-11-25 15:02:54:
QTP(twins)SR
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Recent Answer : Added by Sachin On 2022-03-19 16:02:14:
8400
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Recent Answer : Added by Admin On 2020-05-17 12:03:18:
( C ) Crawl
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Recent Answer : Added by SAID OUJEAR On 2021-08-09 17:01:34:
24 peacocks and 36 rabbits
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3×3=9
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Ques:- A wizard named Nepo says “I am only three times my son's age. My father is 40 years more than twice my age. Together the three of us are a mere 1240 years old.” How old is Nepo?
Recent Answer : Added by Chetan On 2021-07-16 09:53:52:
360 years old
Nepo’s son age = x
Nepo’s age = 3x
Nepo’s father age = 2*3x + 40
x + 3x + 6x + 40 = 1240
10x = 1200
x = 120
Nepos age = 3* 120 = 360 years
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Ques:- Two trains are on same track and they are coming toward each other. The speed of first train is 50 KMs/h and the speed of second train is 70 KMs/h. A bee starts flying between the trains when the distance between two trains is 100 KMs. The bee first flies from first train to second train. Once it reaches the second train, it flies back to the second train ? and so on until trains collide. Calculate the total distance traveled by the bee. Speed of bee is 40 KMs/h. .
Recent Answer : Added by DK BOSS On 2021-07-15 09:17:12:
Answer: 66.67 km approx.
Solution:
Let the first train A move at u km/h.
Let the second train B move at v km/h.
Let the distance between two trains be d km
Let the speed of bee be b km/h
Therefore, the time taken by trains to collide = d/(u+v)
Now putting all the known values into the above equation, we get,
u = 50 km/hr
v = 70 km/hr
d = 100 km
b = 80 km/hr
Therfore, the total distance travelled by bee
= b*d/(u+v)
= 80 * 100/(50+70)
= 66.67 km (approx)
ANS = 24.
16 = 2^4
24 = 2^3 x 3
H.C.F of 16 and 24 = 8
L.C.M will be 48