For the following questions answer them individually
The simple interest on a principal for 6 months at an interest rate of 10% per annum is ₹ 100. What is the principal?
An inlet pipe A originating from a river can fill a reservoir in 30 days. And an outlet pipe B, which is capable of emptying the completely filled reservoir in 50 days, drains out the water from the reservoir to an irrigation canal. The pipes are opened on alternate days starting with pipe A. On which day from the beginning will the reservoir get completely filled for the first time?
Alok starts walking from P with speed of 6 km/h towards Q. Raman starts at the same time from P towards Q with the speed of 9 km/h. Raman reaches Q, turns back, and starts walking towards P. He meets Alok at R. If PQ is 15 km, then what is PR ?
A number is first increased by $$16\frac{2}{3}\%$$ and then decreased by 15% to get 238. What is 37.5 % of that number?
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