15 persons working 6 hours per day earn Rs. 900. How much money will 20 persons earn, working 10 hours per day?
Of the given numbers, one number is a perfect square number which is it?
The value of 80° in radian is
If \(sec\theta + tan\theta =p\), (p >1) then \({cosec\theta +1\over cosec\theta-1 } = ?\)
18 men can complete a certain work in 15 days working 8 hours a day. How many men can complete the same work in 12 days working 9 hours a day?