A man travels 420 kilometres in, partly by rail and partly by steamer. He spends 8 hours more time on steamer. If the velocity of the steamer is 35 km/hr and
the velocity of rail is 65 km/hr, how much distance does he cover by steamer?
1). 395 km
2). 329 km
3). 494 km
4). 592 km
1. The value of $\frac{cot30^{0} - cot75^{0}}{tan15^{0} - tan60^{0}}$ is equal to
2. What is the area (in sq cm) of a rectangle of perimeter 90 cm and breadth 20 cm?
4. A missile travels at 1260 km/h. How many metres does it travel in one second?
5. The degree measure of 1 radian (taking $\pi$ = $\frac{22}{7}$) is
7. What is the value of $sin \left(-\frac{\pi}{3}\right) + cos\left(-\frac{\pi}{6}\right)$?