A 150 m long train crosses another 270 m long train running in the opposite direction in 14 seconds. If the shorter train crosses a pole in 12 seconds, what is the speed of longer train?
Speed of the shorter train = 150/12 = 12.5 m/sec Let the speed of the longer train be x km/hr According to the question, ⇒ (12.5 + x) = (150 + 270)/14 ⇒ 12.5 + x = 420/14 ⇒ x = 30 – 12.5 = 17.5 ⇒ x = 17.5 x 18/5 = 63 km/hr
Which among the given operators should replace the “%” (in the same order) in the given expression below:
7 % 12 % 7 % 38 % 47 % 8
Select the correct sequence of mathematical signs to replace the ‘@’ signs so as to balance the given equation.
264 @ 44 @ 17 @ 6 @ 32 = 76
A recent survey of married couples in Indian metro cities showed that 20% of the couples have only one child, 45% of the remaining couples have two chil...
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
48 * 495 * 5 * 2 * 120 = 126
Select the correct combination of mathematical signs that can sequentially replace the ‘*’ signs and balance the given equation.
16 * 5 * 35 ...
What will be the value of expression if the numbers/digits ‘(42)’ and ‘(18)’ are interchanged?
54 ÷ 42 × 10 + 18 – 12 + 20
...If '+' means '–', '–' means '×', '÷' means '+' and '×' means '÷', then ' 30 – 12 + 20 × 10 ÷ 10 ' = (?)
...If 30 – 22 means 660, 220 + 11 means 20, 14 ÷ 7 means 21, 15 x 12 means 3, then ' 333 – 8 x 255 ÷ 490 + 7 x 32 ' = ?
...In a certain code of language, ‘+’ represents ‘x’, ‘-‘ represents ‘+’, ‘x’ represents ‘÷’ and ‘÷’ represents ‘-‘ what ...
Select the correct combination of mathematical signs that can sequentially replace the ‘*’ signs and balance the given equation.
12 * 8 * 42 ...
