Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 10)
10.
A car travelling with 
of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
Answer: Option
Explanation:
| Time taken = 1 hr 40 min 48 sec = 1 hr 40 | 4 | min = 1 | 51 | hrs = | 126 | hrs. |
| 5 | 75 | 75 |
Let the actual speed be x km/hr.
| Then, | 5 | x x | 126 | = 42 |
| 7 | 75 |
 x = |
 |
42 x 7 x 75 |  |
= 35 km/hr. |
| 5 x 126 |
Discussion:
117 comments Page 6 of 12.
Guru said:
2 decades ago
Hello 1hr 40min 48sec=1.68hr
so then actual speed is 42/1.68=25km/hr but how it is 35km/hr......
Please reply me.....
so then actual speed is 42/1.68=25km/hr but how it is 35km/hr......
Please reply me.....
Divya said:
9 years ago
Can anyone please say answer that how to convert the hour to min and hour to sec?
Please anyone tell me the answer.
Please anyone tell me the answer.
Kailash said:
3 years ago
@Nikita,
Please solve and explain the following step.
(204/5)/60 = 51/75.
Like if I do (204/5)/60 = 4.8/60 = 0.08.
Please solve and explain the following step.
(204/5)/60 = 51/75.
Like if I do (204/5)/60 = 4.8/60 = 0.08.
(7)
ROhit said:
9 years ago
@ Divya.
1hr = 60min
1min = 60 sec
Then 60min = 60 * 60 sec.
Thus 1 hr = 60 * 60 sec = 3600 sec.
Hope it helps.
1hr = 60min
1min = 60 sec
Then 60min = 60 * 60 sec.
Thus 1 hr = 60 * 60 sec = 3600 sec.
Hope it helps.
Tharun Dyanish said:
8 years ago
1 hr 40 kins 48 secs=1.68hrs. The speed is 42/1.68=25.
25*5/7=125/7=17 6/7.
But I want to know how it came 30?
25*5/7=125/7=17 6/7.
But I want to know how it came 30?
Shwetha said:
1 decade ago
1 hr 40min 48sec means 1hr 40min 48/60*60=1hr 40min 1/75 means converting sec in to min then min in to hrs.
P.micheal said:
8 years ago
Hi. Why don't we cut 126/75=42/25? If it's right means the answer will become 25. Is it right or wrong?
Praful said:
1 decade ago
Suppose actual speed is x km/hr.
1 hr 40 min 48 sec = 6048/3600 hr.
42/5/7x = 6048/3600.
x = 35.
1 hr 40 min 48 sec = 6048/3600 hr.
42/5/7x = 6048/3600.
x = 35.
Siddharth said:
1 decade ago
1 hr 40min 48sec= 1 + 40/60 + 48/(60*60) hrs
=1+ 2/3 + 4/300
=(300+200+4)/300
=504/300
=126/75
=1+ 2/3 + 4/300
=(300+200+4)/300
=504/300
=126/75
(1)
Bhavana said:
1 decade ago
1 sec = 0. 01666667.
48 sec * 0. 01666667.
= 0. 8.
= 8/10.
= 4/5.
Hope you got the answer.
48 sec * 0. 01666667.
= 0. 8.
= 8/10.
= 4/5.
Hope you got the answer.
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