For the following questions answer them individually
If 5A = 13B = 7C; find the value of A : B : C.
To travel 708 km, an Express train takes 6 hours more than Rajdhani train. If however, the speed of the Express train is doubled, it takes 3 hours less than Rajdhani train. What is the speed of Rajdhani train?
Find measure of central angle of the arc whose length is 22 cm and radius of the circle is 28 cm?
The area of an equilateral triangle is $$9\sqrt{3}$$ sq cm, find its perimeter?
If $$3x - 10 = -(2x + 5)$$, then the numerical value of $$(x-4)^{3}$$ is
The average revenues of 13 consecutive years of a company is Rs 82 lakhs. If the average of first 7 years is Rs 77 lakhs and that of last 7 years is Rs 89 lakhs, find the revenue for the 7th year.
If $$xy = -30$$ and $$x^{2} + y^{2} = 61$$, then find the value of (x + y).
A bank offers 10% compound interest per half year. A customer deposits Rs. 3600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is.
A number is greater than five times its reciprocal by 19/2. Find the number.
An engineering student has to secure 36% marks to pass. He gets 53 and fails by 37 marks. Find the maximum marks.
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