Question
A train travels from A to B at a speed of 60 km/h, and
then from B to C at a speed of 80 km/h. The total distance covered from A to C is 240 km, and the total time taken is 3.5 hours. What is the distance between B and C?Solution
Let the distance from A to B be x km, and the distance from B to C be (240 - x) km. Time taken to travel from A to B = x / 60, Time taken to travel from B to C = (240 - x) / 80. The total time taken is 3.5 hours, so: x / 60 + (240 - x) / 80 = 3.5. Multiply through by 240 (LCM of 60 and 80) to eliminate the denominators: 4x + 3(240 - x) = 840, 4x + 720 - 3x = 840, x = 120. Thus, the distance between B and C is 240-120 = 120 km.
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will replace the question mark (?) in the following?
9.89%...
45.22 of 499.98% + 399.99 ÷ 20.18 = ?
189.23 + 18.11² + ?³ = √841.76 * 28.94
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value should come in the place of (?) in the following questions?
...
(8160.42 ÷ 33.73) + 309.79 + ? = 30.2 * 81.84- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
(256.19 ÷ 63.99) 2.05 X (7.99) = 2 ? + 2.05
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