The upstream speed of the boat is 40 km/hr and the speed of the boat in still water is 55 km/hr. What is the downstream speed of the boat?

Ramesh started from a point A towards south and travelled 5 km then he turned left and travelled 5 km.How far was he from the point A ?

Which of the fractions given below is not equal to $$\frac{4}{11}$$  ?

A jug has two holes. The Ist hole alone makes the jug empty in 15 minutes and $$2^{nd}$$ hole alone makes the jug empty in 20 minutes. If water leaks out at a constant rate, how long in minutes does it lake if both the holes together empty the jug?

If mathematical operators `$$-$$' and `$$\div$$' are interchanged, then the value of
$$15 \times 4 + 15 - 11 \times 33 \div 98$$ is