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 3 of 12.
Avi said:
4 years ago
Isn't Time = Distance/Speed why did they multiply?
Also explain the step : 5/7x*75/126.
Also explain the step : 5/7x*75/126.
(1)
SHOKINDRA said:
2 decades ago
How to convert the time in second to hours?
Chandra sekar said:
2 decades ago
How to convert min into hrs please tel me.
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.....
Kiran.p said:
2 decades ago
Hai guru 42/1.68 is equal to 35km/hr.
Check it once.
Check it once.
Shreenath said:
1 decade ago
Hi, I am Shreenath and want to know how 1hr 40mins 48secs is converted into 1hr 40 4/5, and then equal to 1 51/75 dint got the method dear.
Bhavana said:
1 decade ago
42/1.68 is 25 km/hr.
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.
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.
Mitali said:
1 decade ago
Thanks Siddharth.
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