Question
A train crosses two platforms of length 1000 m and 600 m
in 80 seconds and 60 seconds, respectively. What is the length of the train?Solution
Let the length of the train be x m. As we know, Speed = (x + 1000)/80 ---(1) Speed = (x + 600)/60 ---(2) From equation (1) and equation (2) (x + 1000)/80 = (x + 600)/60 3 (x + 1000) = 4 (x + 600) 3x + 3000 = 4x + 2400 4x-3x = 3000-2400 x = 600 The length of the train is 600 m.
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40% of (320 ÷ 4) + 2² X 25 = ? + 42 1.25 × 36 + 2.75 × 40 = ? × 3.1
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?2 - 222 = 900 ÷ 4 - √1089
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(1040 ÷ 12) ÷ 19 × 1824 = ?
89 ÷ 512 × (1/64) = (23)?
25639 – 5252 – 3232 = ?