If average of ‘m’numbers is n2 and that of n numbers is m2, then the average of (m and n) numbers is
3.
A train travels at 82.6 km/h.
Howmanymetres will it travel in
1.5min?
4.
64009 is equal to
5.
The present age of aman is 5 times
the age of his son. 5 yr ago, the age of
theman was 10 times the age of his
son at that time. How old is theman
at present?
6.
A 120mlong train takes 10 s to cross
aman standing on a platform. The
speed of the train is
7.
Walking at 7/8 of its usual speed, a
train is 10min late. Find its usual time
to cover the journey
8.
Express
3/4
as rate per cent
9.
If 4 a = 5b and 8b =9c, find a : b : c
10.
65% of a number is 21 less than
4/5th
of that number. Find the number