A reservoir has two pipes, A and B. A can fill the reservoir 5 hours faster than B. If both together fill the reservoir in 6 hours, the reservoir will be filled by A alone in-
The tax on a commodity is diminished by 10% and its consumption increases by 10%. Find the effects on revenue.
There are two squares S1 and S2 The ratio of their areas is 4 : 25. If the side of S1 is 6 cm. What is the side of S2 ?