Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
For motion in the same direction, relative speed is the difference.
Thus, 80 - 55 = 25 km/h.
Choose an option to check your answer.
Downwind speed is 300 km/h and upwind speed is 200 km/h.
Wind speed is half their difference: 50 km/h.
Choose an option to check your answer.
To pass a pole, the train covers its own length.
Speed = 150 ÷ 10 = 15 m/s.
Choose an option to check your answer.
Subtract 7 from both sides of the equation.
This gives x = 19 - 7 = 12.
Choose an option to check your answer.
Twenty-four workers complete 1/4 in 10 days, so the remaining 3/4 needs 30 equivalent days at the same workforce.
Only 20 days remain, requiring 36 workers, so 12 extra are needed.
Choose an option to check your answer.
In four days, each works twice.
Completed work is 2/15 + 2/20 = 4/30 + 3/30 = 7/30.
Choose an option to check your answer.
Let B's rate be 1 unit and A's 3 units, total 4 units.
A alone takes 8 × 4/3 = 32/3 days.
Choose an option to check your answer.
The machine produces 60/5 = 12 units per hour.
In 8 hours it produces 12 × 8 = 96 units.
Choose an option to check your answer.
Their combined rate is 1/12 + 1/18 + 1/36 = 1/6.
Therefore, they finish in 6 days.
Choose an option to check your answer.
If 40% takes 12 days, 10% takes 3 days.
The remaining 60% takes 18 days.
Choose an option to check your answer.
Let B's rate be 2 units and A's rate be 3 units, total 5 units.
If 5 units finish in 6 days, B alone takes 6 × 5/2 = 15 days.
Choose an option to check your answer.
The leak rate is 1/9 - 1/12 = 1/36 tank per hour.
Thus, the leak alone empties the tank in 36 hours.
