Exams

Mansukh can do a piece of work in 10 hours. If he is joined by Jayanti who is 50% more efficient, in what time will they together finish the work?

A Navy captain going away from a lighthouse at the speed of 4[(√3) – 1] m/s. He observes that it takes him 1 minute to change the angle of elevation of the top of the lighthouse from 60 to 45 deg. What is the height (in metres) of the lighthouse?

The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:

A watch is listed for Rs.230 and is sold at a discount of 12%, then the sale price of the watch is

If x3 – y3 = 81 and x – y = 3, then what is the value of x2 + y2?

Project-75 India, sometimes seen in news, is associated with which Indian armed force?

What turns everything around without moving?

What is the remainder when 6910 is divided by 81?