If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in2days, then the time taken by 15 men and 20 boys to do the same type of work will be

If A's capital is equal to three times of B's capital and if B's capital is equal to four times of C's capital, then the ratio of their capitals is

A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30° with the ground. How high on the wall does the ladder reach?

At each corner of a triangular field of sides 26m, 28m, and 30m, a cow is tethered by a rope of length 7m. the area unglazed by the cow? 

4⁶¹ + 4⁶² + 4⁶³ + 4⁶⁴ is divisible by: 

The slopes of two lines are 1 and √3. What is the angle between these two lines? 

A pipe can fill a tank in 72 minutes. But there is a leak in the bottom of the tank due to which the tank is filled in 18 minutes more. Find in how many hours the leak can empty a full tank ?

A car running at 7/11 of its own speed reached a place in 22 hrs. How much time could be saved if the car would run at its own speed?