Question
A train has 9 coaches and an engine. Each coach is 32
metres and the engine is 64 metres. Time taken by the train to cross a platform, whose length is 50% of the length of the train, is 48 seconds. Find the time taken by the train to cross a man travelling in the same direction as the train with a speed of 7 m/s.Solution
Length of train = 9 × 32 + 64 = 288 + 64 = 352 metres Length of platform = 0.5 × 352 = 176 metres Speed of train = (352 + 176) ÷ 48 = 528 ÷ 48 = 11 m/s Relative speed = 11 − 7 = 4 m/s Time to cross man = 352 ÷ 4 = 88 seconds
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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