An office opens at 9 a.m. and closes at 5 p.m. with a lunch interval of 30 minutes. What is the ratio of lunch interval to the total period in office?

An office opens at 9 a.m. and closes at 5.30 p.m. with a lunch break of 30 minutes. What is the ratio of lunch break to the total period in the office?

A movie started at 11:00 a.m. and ended at 2:15 p.m., including an interval of 15 minutes. Then the ratio of movie time (excluding interval) to interval is

A bus starts its journey at 5:30 a.m. and reaches its destination at 9:15 p.m. with a stoppage time of 2 hours. Find the ratio of the stoppage time to the total journey period.

For a 5 cm long minute hand in the wall clock , find the displaceement of the tip of the hand in an interval of 30 minutes . Also find the ratio of distance to displacement .

In a school, the bell is rung once after each half an hour. The school starts at 8:00 a.m. and closes at 1:30 p.m. The bell is rung 3 times continuously. at the time of beginning, at the time of lunch break at 10:00 and 10:30 a.m. and at the end. How many times is the bell rung every day?

a program started at 5:30 p.m. if it lasted 3 hour 45 minutes at what time did it finish?

A class starts at 10 a.m. and lasts till 1.27 p.m. Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is (a) 42 minutes (b) 48 minutes (c) 51 minutes (d) 53 minutes

A boy slept at 9.45 p.m. and woke at 5.30 a.m. next morning. How much time did he sleep?