Book Maths Puzzle General Ability

A steamer can travel at 9 km/hr upstream and at 12 km/h downstream.at what speed is the stream running.

Read Solution (Total 1)

1.5 km/hr

If speed(km/hr) of steamer=x and stream=y, then
For upstream, x- y=9 ---(i) and for downstream= x+y=12 ---(ii)
From (i) & (ii), x=10.5 and y=1.5
9 years agoHelpfull: Yes(0) No(0)

Book Other Question

Children of class VIII prepared stuffed toys for school fete .They spent Rs. 100.00 on velvet ;Rs. 5.00 on thread and needle ,and Rs. 27.00 on coloured buttons,ribbons,artificial stones and wool etc.For stuffing,they bought old socks and nylon clothes from their homes.they turned out 30 toys,50% of which were purchased per force by some senior students causing tem a loss of 50% .at what profit% should they sell the remaining toys so as to get 50% on their total investment. 2*9=306,
4*8=?