Question
Train ‘A’ running with a speed of 72 km/h crosses a
pole in 8.5 seconds. If the time taken by train ‘A’ to cross train ‘B’ running with a speed of 36 km/h and coming from the opposite direction is 11.4 seconds, then find the length of train B.Solution
ATQ, Speed of train A = 72 × 5/18 = 20 m/s Length of train A = 20 × 8.5 = 170 metres Let length of train B = ‘l’ metres Speed of train B = 36 × 5/18 = 10 m/s Relative speed of train A with respect to train B = 20 + 10 = 30 m/s So, l + 170 = 30 × 11.4 = 342 So, l = 342 - 170 = 172 metres
20% of 1500 – 75% of 200 = 125% of ?
24% of 150% of 500 + 140 = ? × 8
458.32 - 563.32 + 659.32 =?
What will come in the place of question mark (?) in the given expression?
(√1089 + 84 ÷ 2) % of 348 = 416 - ?
40% are the passing marks. A student gets 250 marks yet fails by 38 marks. What is the maximum marks?
(22.5 × 24) ÷ 40 + 51.50 = ? ÷ 5.25
36×?² + (25% of 208 +13) = 60% of 2400 + 17×18
What will come in the place of question mark (?) in the given expression?
√64 X 9 ÷ 3 + 12 X 3 = ? + 36(3/7) x 868 + 25% of 240 = (? + 65)
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