Mohan, having a mass of 40 kg. runs up a staircase of 50 steps in 10 s. If the height of
each step is 15 cm. then what is his power ?
(Take g = $10 m/s^{2}$)
1). 200 W
2). 400 W
3). 300 W
4). 100 W
What is the type of Energy possessed by a stretched rubber band?
1). Chemical energy
2). Potential energy
3). Kinetic energy
4). Thermal energy
Which of the following gases is liberated when Sodium Hydrogen Carbonate is heated ?
1). Hydrogen
2). Carbon Monoxide
3). Carbon Dioxide
4). Oxygen
If the cost of 17 m of cloth is Rs. $77\frac{5}{7}$ Find its cost per meter (in rupees) ?
1). $7\frac{5}{7}$
2). $4\frac{5}{7}$
3). $5\frac{5}{7}$
4). $4\frac{4}{7}$
Shiv sold a shirt for 7184 at a loss of 8%. To make a profit of 5% he should have sold the
shirt for:
1). Rs. 200
2). Rs. 197
3). Rs. 210
4). Rs. 207.92