If a : b = 4 : 1, then find (a - 3b)/(2a - b).
A). 2/7
B). 1/7
C). 3/7
D). 5/7
1/7
a : b = 4 : 1
a/b = 4/1 => a = 4b
(a - 3b)/(2a - b) = (4b - 3b)/[2(4b) - b]
= b/(8b - b) = b/7b => 1/7
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1. If a certain amount is fully distributed among A, B & C in such a way that A receives 1/3rd of the amount, B receives 1/9th of the amount and C receives Rs. 5000, then how much money would A receive
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4. A train of length 180 metres crosses a tree in 15 seconds and crosses another train of the same length travelling in opposite direction in 20 seconds. What is the speed (in km/hr) of the second train?
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7. Divide Rs.2600 among A, B, C in the ratio $\frac{1}{2}:\frac{1}{3}:\frac{1}{4}$. Find the share of each .
8. If P/Q = 5, then find the value of \(\frac{{{P^2} + {Q^2}}}{{{P^2} - {Q^2}}}\).
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