Question
What is the average of odd numbers greater than 10 but
less than 30?Solution
ATQ, Odd numbers greater than 10 but less than 30 = 11, 13, 15, 17, 19, 21, 23, 25, 27, 29 Required average = 
= 200/10 = 20
Train P travelling at 42 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 30 km/hr in 21 seconds...
A train 175 m long running at 54 km/hr takes 40 seconds to cross a bridge. The length of the bridge is
A train takes to cross a man standing on a platform and a 360m long bridge 12 sec and 30 sec respectively. How long will it take to cross a 220m long pl...
Train A. running at the speed of 80 km/hr crossed train B. running at the speed of 70 km/hr in the opposite direction. Both trains finish crossing each ...
Train crosses a bridge which is 250 m long in 25 sec. Find the time taken by train to cross a man running in opposite direction at speed of 15m/sec. Fi...
A train 200 metre long takes 20 sec to cross a man running at a speed of 4 km/hr in the direction same to that of train. What is the speed of the train?
An Indian express train is traveling at 9/15th of its normal speed and takes 45 hours to reach its destination. How much time would be saved if the trai...
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 26 seconds and 16 seconds respectively. It took 18...
A 160 m long train crosses another 280 m long train running in the opposite direction in 11 seconds. If the shorter train crosses a pole in 8 seconds, w...
Train P travelling at 50 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 40 km/hr in 14 seconds...
Relevant for Exams:
