Section - Mathematics
The angles of elevation of the top of a tower from two points X and Y (on opposite sides of the tower) at distances b2 m and a2 m, respectively, from the base and in the same straight line with it are complementary. The height (in m) of the tower is _____.
ab\( \frac{1}{2} \)
(ab)\( \frac{1}{2} \)
ba\( \frac{1}{2} \)
ab
If the interest earned during the 2nd year on a certain sum is ₹2,352, and the rate of interest is 5% per annum compounded annually, then the sum is:
By how much is 65% of 65 greater than \( \frac{1}{5} \) of 15?
Jaya can do a certain piece of work in 30 days. Jaya and Sushma can together do the same work in 21 days, and Jaya, Sushma and Hina can do the same work together in 14 days. In how many days can Jaya and Hina do the same work together?
\( \frac{35}{2} \)
\( \frac{31}{3} \)
\( \frac{44}{2} \)
\( \frac{27}{4} \)