Question
A 180-metre train takes 9 seconds to cross a pole. If
the same train takes 18 seconds to cross train 'D' that is travelling in opposite direction at 14 m/s on a parallel track, then find the length of train 'D'.Solution
ATQ, Speed of train 'A' = (180 ÷ 9) = 20 m/s Let the length of train 'D' be 'x' metres. ATQ; (180 + x) ÷ (20 + 14) = 18 Or, 180 + x = 612 So, 'x' = 612 - 180 = 432 Therefore, length of train 'D' = 432 metres
What approximate value should replace the question mark?
12.45% of 640.20 − 60% of 2500 = ? − 9000.10
`[(7.99)^2 - (13.001)^2 + (4.01)^3]^2=` ?
- 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 value should come in place of question mark (?) in the following question. (You need not to calcualte the exact value)
?/647 = 226/ ?
- 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.)
A, B & C have Rs.1550 together. If they divide the money in the ratio 1:3:1 respectively. Find the difference of amount received by B and C.
What approximate value should come in the place of (?) in the following questions?
∛(92.8 + √1025) * ? = 16.06% of 750
√1024.21 × √624.89 ÷ 4.98 + 11.99 × 4.01 = ?
√784 × 3 + (713.99 ÷ 6.98) = ?% of 619.99
11.11% of (123.45 + 234.56) + 10.01³ - (5.05 of 7.07) = ? of (88.88 - 33.33)
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