Question

1. Convert the following:

(i) 9 hours to minutes

(ii) 1 hour 15 minutes to seconds

(iii) 5 days to hours

(iv) 540 Days into weeks and days.

II. Add the following:

(i) 17 minutes 25 seconds and 29 minutes 39 seconds.

(ii) 6 hour 28 minutes 45 seconds and 7 hour 38 minutes 28 seconds.

Q2.) 148 m wire is required to fence a square field .Find one side of the field.

Q3.) The internal edge of a cubical tank is 15 m.Find its volume?

Q4.) Find the 14th triangular number?

Q5.)Find the next square number:

a) 144 b)169

Q6.) Subtract

i)25 months 25 days from 30 months 10 days.

ii)35 minutes 25 seconds from 50 minutes.

Q7.The perimeter of a room is 18 m. It is 4m wide .Find its length and area?

Q8.)How much will it cost to fence a park 89 m long and 75 m wide at the rate of ₹ 5 per metre?​

Answer 1

1) 1 hr. = 60 minute

so 9 hour = 9×60 =540 min.