If a clock takes seven seconds to strike seven, how long will it take to strike ten ? Choose the correct choice from the following.
A) 7 seconds  B) 9 seconds  C) 10 seconds  D) 15 seconds  E) None of these
Explanation:   Clearly, seven strikes of a clock have 6 intervals while 10 strikes have 9 intervals.   Therefore, Required time=[7/6*9]seconds = 10 1/2 seconds.   Answer: None of these
<result>E</result>
If a clock takes seven seconds to strike seven, how long will it take to strike ten ?