A goods train leaves a station at 6pm, followed by an express train which leaves at 8pm and travels 20 km/hr. faster than the goods train. The express train arrives at a station, 1040 km away, 36 min. before the goods train. Assuming that the speeds of both the trains remain constant between the two stations, calculate the speeds. A. 80 km/hr and 100 km/hr B. 20 km/hr and 40 km/hr C. 60 km/hr and 80 km/hr D. 120 km/hr 100 km/hr

How do you find the Maclaurin series for tanx?

Why is Axiom 5, in the list of Euclid’s axioms, considered a ‘universal truth’? (Note that the equation is not about the fifth postulate.)

The smallest composite number is ______.

(a) 2

(b) 4

(c) 1

(d) None of these

Find the arithmetic mean of the first ten odd natural numbers.

A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream in 6 hours and 30 minutes. The speed of the boat in still water is

A. 10 km/hr

B. 4 km/hr

C. 14 km/hr

D. 6 km/hr