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Q1.

$A$ cyclist goes from one place to another and returns by the same route. He pedals his way uniformly with speed $u$ while going and with speed $v$ while returning. The average speed of his journey is

(A)

$\frac{u+v}{2}$

(B)

$\frac{u-v}{2}$

(C)

$\frac{1}{\frac{1}{2}(\frac{1}{u}+\frac{1}{v})}$

(D)

$\frac{1}{\frac{1}{2}(\frac{1}{u}-\frac{1}{v})}$

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Q2.

$A$ student bought $4$ books for $Rs. 120$ from one book shop and $6$ books for $Rs. 150$ from another. The average price (in rupees),he paid per book was

(A)

$27$

(B)

$27.50$

(C)

$135$

(D)

$138$

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