Question
A train is moving at a constant speed of 234 km/hr. It
takes 8 seconds to pass a pole and 18 seconds to cross a platform. Calculate the difference between the lengths of the platform and the train.Solution
Length of the train = 234 × (5/18) × 8 = 65 × 8 = 520 metres Let the length of the platform be ‘l’ metres Therefore, 520 + l = 65 ×18 Or, l = 1170 – 520 = 650 metres Required difference = 650 – 520 = 130 metres
Given a triangle with two sides measuring 12 cm and 16 cm, which of the following cannot be a possible length for the third side?
- Find the remainder on dividing (5x 3 + 4x 2 – 10x + 1) by (2x – 4).
The area (in sq, units) of the triangle formed by the graphs of 8x + 3y = 24, 2x+8 = y and the x – axis is:
If x −y =4and xy =45,thenthevalueof x 3 −y3is:
If x + y = 2 and 1/x + 1/y = 18/15, then find the value of (x3 + y3)?
22% of ‘x’ is equal to 66% of ‘y’, then find the value of x: y.
If y + 1/y = 2 then find y117 + 1/(y117)
if a2 + b2 + c2 = 2(4a -5b -9c)-122 , then a-b-c = ?
If a – b – c = 0, then the value of (a2 + b2 + c2)/(b + ac) is:
If 5x - 13xy + 6y = 0, find x : y.
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