A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time it has to increase its speed by 250 km/h from its usual speed. The usual speed is
A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time it has to increase its speed by 250 km/h from its usual speed. The usual speed is
The following table shows the distribution of weekly salary (in Rs.) of 1000 workers:
| Weekly Salary | No. of Workers |
| Less than 50 | 40 |
| 51-75 | 120 |
| 76-100 | 200 |
| 101-125 | 300 |
| 126-150 | 150 |
| 151-175 | 100 |
| 176-200 | 55 |
| 201 and above | 35 |
What will be the minimum value of x for which the number {3(x + 63) + 640} is completely divisible by 17?
The age of a father is twice that of the sum of the ages of his two sons. 20 years later, the age of the father will become the sum of the ages of his two sons. The present age of the father is
A monkey climbs a 12 meters high slippery pillar. In his first minute, he climbs 2 meters and in the next minute, he slips one meter down. In this way, how much time will he take to reach the top of the pillar?