Some toffees are bought at the rate of 11 for Rs.10, and another batch of the same number of toffees, at the rate of 5 for Rs. 6. If the whole lot is sold at Rs.2/toffee then the gain/loss percentage, correct to one decimal place, on the whole transaction is:

Pipes A, B and C can fill a tank in 30 h, 40 h and 60 h respectively. Pipes A, B and C are opened at 7 a.m., 8 a.m., and 10 a.m. respectively on the same day. When will the tank be full?

A buys an article for Rs.900 and sells it to B at a profit of 25%. B sells it to C, who sells it for Rs.1,350, at a loss of 10%. What profit percent (to the nearest integer) did B make?

A pole stands vertically inside a scalene triangular park ABC. If the angle of elevation of the top of the pole from each corner of the park is same, then in ΔABC, the foot of the pole is at the