An interval of 3 hours 40 minutes s wrongly estimated as 3 hours 45.5 minutes. The error percentage is `2. 5` b. `5` c. `5. 2` d. `5. 5`

4/5 th of 1 hour is ___ minutes.

Find the ratio of : 5 hours and 50 minutes to 8 hours and 10 minutes.

Find: a. (2)/(5) of 3 hours

A lunch interval of half an hour is 5 % of the total office hours. Calculate the total office hours.

Smita works in her office for 6 hours and Kajal works in her office for 7 hours 30 minutes. Find the ratio of their working hours.3:5 b.4:5 c.6:7 d.5:4

A radioactive substance has an averge life of 5 hours. In a time of 5 hours the decay in percentage is

A truck covers a distance of 50 metres in 1 minute whereas a bus covers distance of 33kms in 45 minutes.The ratio of their speeds is 3:44 b.4:3 c.3:5 d.50:3