A wall-clock takes 9 seconds in tringing at `9\ O^(prime)` clock . The time, it will take in tringing at `11\ O^(prime)` clock , is (a) 10 sec. (b) 10.80 sec. (c) 11 sec. (d) 11.25 sec.

A wall clock takes 10 seconds to strike 6. How much time it will take to strike 12.

In a kilometre race,A beats B by 30 seconds and B beats C by 15 seconds.If A beats C by 180m, the time taken by A to run 1 kilometre, is (a) 200 sec ( b ) 205 sec ( c ) 210 sec (d) 250 sec

A mechanical grandfather clock is at present showing 7 hr 40 min 6 sec. Assuming that it loses 4 seconds in every hour, what time will it show after exactly 6 1/2 hours? (a) 14 hr 9 min 34 sec (b) 14 hr 9 min 40 sec (c) 14 hr 10 min 6 sec (d) 14 hr 10 min 32 sec

The median of first 10 prime numbers is (a) 11 (b) 12 (c) 13 (d) 14

A train of length 100m travelling at 50m/s overtakes another train of length 200m moving at 30m/s. The time taken by the first train to overtake the second is (A) 5 sec (B) 10sec(C)15sec(D)20sec

If a clock strikes six times in 5 seconds, the number of strikes in 10 seconds is (a) 8 (b) 9 (c) 10 (d) 11

Two pipes A and B can fill a tank in 12 and 16 minutes respectively. Both pipes are opened together, but 4 min before the tank is full, pipe A is closed. In how many minutes will the tank be full? (A) 9 min B sec (B) 10 min 9 sec (C) 11 min 19 sec (D) 11 min 29 sec

A train,150m long,takes 30 seconds to cross I' bridge 500m long.How much time will the train,take to cross a platform 370m long? 18backslash sec b.24backslash sec c.30backslash sec d.36backslash sec

The sum of the first four primes is (a) 10 (b) 11,(c)16, (d) 17