In a km race, Ashok beats Raman by 30 meters or 12 seconds. Find Ashok’s approximate time over the course?
OPtion
1) 10 min.
2) 7 min.
3) 5.5 min.
4) 4.3 min.
5) 6 min.
6) 8.5 min.
7) 7.7 min.
8) 6.46 min.
9) 5.22 min.
10) None of the above
Solution
As given, Raman covers 30 m in 12 seconds.
Raman’s time over the course = 12/30 x1000 = 400 seconds
Ashok’s time over the course = (400 – 12) = 388 seconds = 6.46 minutes
How many seconds will a 468 m long train take to cross a man driving his motor bike at a speed of 39 km/hr in a direction of the moving train if the speed of the is 120 Km/hr.
Let the new S.P. be ₹ x
Then, (100 – loss%) : (1st S.P.) = (100 + gain%) : (2nd S.P.)
(100 – 6) / 1269 = (100 + 6) / x
X = (106 x 1269)/94
X = 134514/94 = ₹1431
Abhay, Bhaskar and Chetan earns ₹ 400 per day, while Abhay and Chetan together earn ₹ 190 and Bhaskar and Chetan together earns ₹ 262. Find out the daily earning of Chetan.
A library has an average of 510 visitors on Sunday and 240 on other day. What is the average number of visitors per day in a month of 30 days whose beginning with a Monday?
Since the month begins with a Monday so there will be only 4 Sundays in the month.
Hence required average
{(510 x 4 + 240 x 26)/30} = (2040 + 6240)/30
= 8280/30 = 276
Sum of present age of Pawan and Ravi = 2x30 + 2x6 = 72
As average of Pawan, Ravi and Ranjan is 30 today.
so total age of Pawan, Ravi and Ranjan = 3x30 = 90
So, Ranjan’s age as today = 90 – 72 = 18
Hence age of Ranjan’s after 6 year will be = 18 + 6
= 24 years
The sum of ages of Jagmohan, Vijay and Shubham is 78 year.
The sum of ages of Jagmohan, Vijay and Shubham after 6 years will be
78 +3*6= 78+18=96 years.
Their average age will be 96/3=32 years.