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If the arithmetic mean of 3a and 4b is g...

If the arithmetic mean of 3a and 4b is greater than 50, and a is twice b, then the smallest possible Integer value of a is

A

18

B

19

C

20

D

21

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  14. If the ratio of cost price to selling price is 10:11,then the rate of ...

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  17. A farmer travelled a distance of 61 km in 9 hours. He travelled partly...

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  18. A man rows upstrean 36 km and downstream 48 km taking 6 hours ea...

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