Ques:- A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
Recent Answer : Added by Admin On 2022-09-29 16:19:13:
Explanation:
72 — 9
? —- 1
=> Down Stream = 8
45 —- 9
? —- 1
=> Up Stream = 5
Speed od current S = ?
S = (8 – 5)/2 = 1.5 kmph.
Ques:- The H.C.F and L.C.M of two numbers are 44 and 264 respectively. If the first number is divided by 2, the quotient is 44. The other number is
A. 66
B. 132
C. 264
D. 528
Recent Answer : Added by Shiva Akhil On 2023-06-09 12:28:38:
let,first num be x and second num be y
hcf =264
lcm=44
given equation
x/2=44 i.e x=88
product of 2 numbers is equal to lcm*hcf
88*y=44*264
y=132
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Ques:- A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water?
Recent Answer : Added by Admin On 2022-09-29 16:10:32:
Given:
Speed of man downstream= 30/3=10km/h
Speed of man in upstream=18/3=6km/h
Speed of man in still water=1/2 (speed of upstream+ speed of down stream)
= 1/2 (10+6)
=1/2*16
=8km/h
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Ques:- A car travels a certain distance taking 7 hrs in forward journey, during the return journey increased speed 12km/hr takes the times 5 hrs.What is the distance travelled
A. 210 kms
B. 30 kms
C. 20 kms
D. none of these
Recent Answer : Added by Michael Torcaso On 2022-08-14 16:28:58:
Let d = 7r. And use distance is = rate × time
7r= ( r+12) 5
7r= 5r + 60
Subtract 5r from both sides
2r = 60
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Recent Answer : Added by Admin On 2020-05-17 12:04:31:
Let us consider previous salary as a ‘X’ then
0.12*X=0.10*(X+1200)
0.02X=120
X=120/.02=6000
X=6000
His previous salaray was 6000
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Recent Answer : Added by reniy On 2022-10-11 16:07:04:
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Recent Answer : Added by shivaprasad On 2021-10-12 12:52:39:
(x+2)^2 -x^2 = 84
X=20
So (20,22)
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Recent Answer : Added by Admin On 2020-05-17 11:59:16:
360 times
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373
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Recent Answer : Added by Lavanya V On 2021-03-06 16:42:09:
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Explanation:
72 — 9
? —- 1
=> Down Stream = 8
45 —- 9
? —- 1
=> Up Stream = 5
Speed od current S = ?
S = (8 – 5)/2 = 1.5 kmph.