At t minutes past 2 pm, the time needed by the minutes hand of a clock to show 3pm was found to be 3 minutes less than `(t^2)/4 minutes. Find t.

At t minutes past 2pm, the time needed to 3 pm is 3minutes less than (t^(2))/(4) find t.

The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 10 minutes.

Find the angle between the minute hand and the hour hand of a clock when the time is 7:20 AM.

the minute hand of a watch is 1.5 cm long . Find the distance covered by its tip in 40 minutes ( use pi =3.14

The activity of a radioactive sample is measured as N_0 counts per minute at t=0 and N_0//e counts per minutes at t=5 minutes. The time (in minutes ) at which the activety reduces to half its value is :

A pot of boiling water at 100^(@)C is removed from a stove at time t = 0 and left to cool in the kitchen. After 5 minutes, the water temperature has decreased to 80^(@)C , and another 5 minutes later it has dropped to 65^(@)C . Determine the temperature of the kitchen.

A spherical balloon is filled with 4500p cubic meters of helium gas. If a leak in the balloon causes the gas to escape at the rate of 72pi cubic meters per minute, then the rate (in meters per minute) at which the radius of the balloon decreases 49 minutes after the leakage began is (1) 9/7 (2) 7/9 (3) 2/9 (4) 9/2