Question
The ratio of P :Q is 3 : 5 and that of Q : R is 4 : 7.
If P equals 2400, then what is the value of R?Solution
Given: P : Q = 3 : 5 Q : R = 4 : 7 Since P = 2400 According to P : Q = 3 : 5, 3 units = 2400 So, 1 unit = 2400 ÷ 3 = 800 Therefore, Q = 5 × 800 = 4000 Now, according to Q : R = 4 : 7, 4 units = 4000 So, 1 unit = 4000 ÷ 4 = 1000 Therefore, R = 7 × 1000 = 7000 Hence, the value of R is 7000.
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