Question
A train has to cover a distance of 90 km in 15 hours. If
it covers half the journey in 4/5 th of the time, the speed to cover remaining distance in the time left has to beSolution
Total Distance = 90km Total Time = 15 hours 4/5th of the time = 15 × 4/5 = 12 hours Now, remaining distance = 90-45 = 45km Remaining time = 15 – 12 = 3 hours Average speed to cover the distance of 45 km will be 45/3 = 15km/hr.
Solve for x in the equation: 3(x + 2) + 2(2x - 5) = 5x + 9
If x = 19, then the value of x5 - 20x4 + 20x3 - 20x2 + 20x - 1 is
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?
The mean age of 30 students was calculated as 15 years. However, it was later discovered that one student's age was mistakenly entered as 15 years inste...
In a triangle ABC, a point D lies on AB and points E and F lie on BC such that DF is parallel to AC and DE is parallel to AF. If BE = 4 cm. EF = 6cm. th...
If a = 32, b = c = 31, then find the value of a 3 + b 3 + c 3 – 3abc.
If x3 + y3 = 9 and x + y=3 then the value of x4 + y4 is:
105, 111, 123, 141, ?, 195
Let {x + (1/x)} = 4, then Determine the value of {x² + (1/x²)}
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