An aero plane flying with the wind cover… | Answer

Subject

Quantitative Aptitude

Topic

Algebra

An aero plane flying with the wind cover a certain distance in 2 hrs the return trip against the wind takes 2.5 hrs. How fast is the plane, if the one –way distance is 600 miles? (In miles/hour)
Reading

ক)

270

খ)

গ)

240

ঘ)

ঙ)

250

Explanation

Let the speed of the plane be x miles/hrs Let the speed of the wind be y miles/hrs Speed = distance/time Speed of plane against wind = x - y Speed of plane with wind = x + y

\begin{array}{l} \therefore \frac{{600}}{{x - y}} = 2.5\\ \therefore \frac{{600}}{{x - y}} = \frac{5}{2} \end{array}

∴ 240 = x - y ….(i) ∴ 600 / (x + y) = 2 ∴ x + y = 300 ….(ii) Adding (i) and (ii) ∴ 2x = 540 ∴ x = 270 ∴speed of plane = 270 miles/hrs

\frac{a}{3} = \frac{b}{4} = \frac{c}{7}

then what would be the value of

\frac{{a + b + c}}{a}

?Multiplication and difference of two numbers are 93 and 28 respectively. Find the difference of reciprocals of the numbers.if

{P^2} + {1 \over {{P^2}}} = 7

, then find the value of

{P^2} - {1 \over {{P^2}}}.

In following question, two equations are given, you have to solve them and choose the correct option: x2– 3x – 4 = 0, y2– 4 = 0 In following question, two equations are given, you have to solve them and chose the correct option: x2+ 11x + 30 = 0, y2+ 7y + 12 = 0 In the following question, one or two equation(s) is/are given. You have to solve both the equations and find the relation between ‘l’ and ‘m’ and mark correct answer. I. (125)1/3l – (1331)1/3= 4 × (729)1/6+ (1024)1/10II. (m)2– (15625)1/3= 0 Direction: In the following question two equations numbered I and II are given. You have to solve both the equations and give answers:I: x - √121 = 0 II: y2- 121 = 0 The number of solutions of x2+ 4|x| + 5 = 0 is

An aero plane flying with the wind cover a certain distance in 2 hrs the return trip against the wind takes 2.5 hrs. How fast is the plane, if the one –way distance is 600 miles? (In miles/hour)Reading

An aero plane flying with the wind cover a certain distance in 2 hrs the return trip against the wind takes 2.5 hrs. How fast is the plane, if the one –way distance is 600 miles? (In miles/hour)

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An aero plane flying with the wind cover a certain distance in 2 hrs the return trip against the wind takes 2.5 hrs. How fast is the plane, if the one –way distance is 600 miles? (In miles/hour)
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