Question
What is the speed of a train? Statement I: The
train crosses a pole in 10 seconds. Statement II: The length of the train is 240 metres. Statement III: The train crosses a platform of equal length in 20 seconds.Solution
From I and II, Speed = 240/10 = 24 m/sec. From II and III, Speed = 240/20 = 12 m/sec. From II and either I or III, we can find the speed of the train.
A and B together can complete a task in 12 days. B alone can complete it in 20 days. How long will it take A to complete the task if he works alone?
A man travels the first part of his journey at a speed of 40 km/h and the second part at a speed of 60 km/h. What is the average speed of the man?
A sphere is inscribed in a cylinder. The radius of the cylinder is 7 cm. What is the volume of the sphere?
Let vectors a, b, and c be such thata · b = 0, b · c = 0, and c · a = 0.
If |a| = 2, |b| = 3, |c| = 6, then the volume of the parallelepiped f...The first, second and fourth terms of a ratio are 4, 6 and 12 respectively. So what will be the third term?Â
1153, 1206, ?, 1326, 1393, 1464
A shopkeeper marks an article 50% above the cost price and then gives two successive discounts of 20% and 10%. What is his overall profit or loss percen...
In a triangle, the angles are in the ratio 1:2:6. Determine the difference between the smallest and the largest angle.
Find the simpliied value of the following expression:
12 × [15 of 8 - 6 of (32 - 8 of 3)]Â
Simplify the following expression -:
120 + 480 ÷ 16 × 6 + {(240 ÷ 2.5) × 5 + 120} ÷ 5
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