Question
A train 270 metre long takes 36 sec to cross a man
running at a speed of 4 km/hr in the direction opposite to that of train. What is the speed of the train?Solution
Let the speed of the train be x Relative speed = (x + 4) km/hr ⇒ (x + 4) = (270 × 18)/(36 × 5) ⇒ (x + 4) = (4860)/(180) ⇒ x + 4 = 27 ⇒ x = 27 – 4 = 23 km/hr
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 man must travel 600 km in 12 hours. If he traveled the first 40% of the journey at a constant speed of 80 km/h, at what speed must he travel the remai...
78% of 1450 + 26² = ? + 1323 ÷ 17
What will come in place of the question mark (?) in the following series?
50, 25, 25, ?, 75, 187.5
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.)...
`(601/49)xx(399/81)` ÷ `(29/201)` = ?
(424.98 ÷ 16.99 + ?) × 1.99 - 211.99 ÷ 2.01 = 24.98 × (4.012 - 3.99)Â
(7008.79)2/7009.201 × √1442.76 × 0.4897 =?
25.19% of (?2 ÷ 38.87 × 4679.94) = 6299.82 ÷ 419.78 × 50.15
7480 ÷ 16.98 – 34.32 ÷ (4.99/99.9) = ?
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