Question
A train 175 m long running at 54 km/hr takes 40 seconds
to cross a bridge. The length of the bridge isSolution
Speed of train = 54 km/hr = 54 × (5/18) = 15 m / sec If the length of bridge be x metre, then ⇒ 15 = (175 + x)/40 ⇒ 175 + x = 600 ⇒ x = 600 – 175 = 425 metre
A cone has a base radius of 7 cm and a slant height of 25 cm. Find the total surface area of the cone.
146, 302, 165, ?, 184, 264
50 men takes 10 less days to do a work than 30 men takes time for same work. Find in how many days 15 men can complete the 2/5th of the work?
In a class, 70% of the students are adults, and 40% of the adults are females. If the number of adult males in the class is 105, ...
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What will come in place of the question mark (?) in the following series?
120, 128, 144, 168, 240
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If the homogeneous system of equations
x + y + z = 0
2x + 3y + 4z = 0
has a non-trivial solution, then the value of k is:
3x + 5y + kz = 0
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