Question
300 metre long train ‘A’ is running with a speed of
25.2 km/hr. Train ‘B’ which is 364 metre long is running with a speed of 90 km/h in opposite direction of train ‘A’. For how much time, the smaller train is completely obscured by the larger train when they cross each other?Solution
Length of smaller train = 300 metre Speed of smaller train = 25.2 × (5/18) = 7 m/s Length of bigger train = 364 metres Speed of bigger train = 90 × (5/18) = 25 m/s Since, the smaller train is completely obscured by larger train, therefore, extra length of larger train = 364 – 300 = 64 metres Relative speed of trains ‘A’ and ‘B ‘= 7 + 25 = 32 m/s (Since, the trains are running in opposite direction) Required time = 64/32 = 2 second
15 × 35 ÷7 + 60% of 300 =?
- What will come in place of the question mark (?) in the following questions?
120÷(5×2)+8=? 1/6+ 999*53/54 ×9 = ?
9 × 4 ? ÷ 16 = 144
- Simplify:
25% of [160% of (42 + 18) + 124] ÷ 66 × 150 What will come in the place of question mark (?) in the given expression?
? X (62 - 20) + 60 X 5 = √1296 X 25 - 35 X 43...
4(1/3) × 2(11/14) = 50% of ? + 86/11
(1/5)(40% of 800 – 120) = ? × 5
84% of 8400 + 42% of 6120 =?
{(80% of 650 + 25 × 12) – 20 × ?} = 760
