6th Maths : Term 2 Unit 2 : Measurements
Exercise 2.2
Text Book Back Exercises Questions with Answers, Solution
1. Say the time in two ways:
Answer:(i) 10:15 hours; quarter past 10
(ii) 6:45 hours; quarter to 7
(iii) 4:10 hours; 10 minutes past 4
(iv) 3:30 hours; half past 3
(v) 9:40 hours; 20 minutes to 10
2. Match the following:
3. Convert the following:
(i) 20 minutes into seconds
20 minutes = (20 × 60) seconds (60 seconds = 1 mt) = 1200 seconds
(ii) 5 hours 35 minutes 40 seconds into seconds
5 hours 35 minutes 40 seconds
(5 × 60 × 60) seconds + (35 × 60) seconds + 40 seconds
18000 seconds + 2100 seconds + 40 seconds = 20140 seconds
(iii) 3 ½ hours into minutes
3 ½ hours = 3 hours 30 minutes
= (3 × 60 ) minutes + 30 minutes
= 180 minutes + 30 minutes = 210 minutes
(iv) 580 minutes into hours
580 minutes = (580 ÷ 60) hours = 9 hours 40 minutes.
(v) 25200 seconds into hours
25200 seconds = (25200 ÷ 3600) hours = 7 hours.
4. Total duration of consumption of electricity
The duration of electricity consumed by the farmer for his pumpset on Monday and Tuesday was 7 hours 20 minutes 35 seconds and 3 hours 44 minutes 50 seconds respectively.
Total duration = 11 hrs 5 mts 25 secs.
5. Subtract 10 hours 20 minutes 35 seconds from 12 hours 18 minutes 40 seconds
Result = 1 hour 58 minutes 5 seconds.
6. Change into 12 hour format
(i) 02:00 hours = 2 a.m
(ii) 08:45 hours = 8:45 a.m
(iii) 21:10 hours = 9:10 p.m
(iv) 11:20 hours = 11:20 a.m
(v) 00:00 hours = 12 midnight
7. Change into 24 hour format
(i) 3.15 a.m = 3:15 hours
(ii) 12.35 p.m = 12:35 hours
(iii) 12.00 noon = 12:00 hours
(iv) 12.00 midnight = 00:00 (or) 24:00 hours
8. Calculate the duration of time
(i) from 5.30 a.m to 12.40 p.m
Duration = 7.10 hours
(ii) from 1.30 p.m to 10.25 p.m
Duration = 8.55 hours
(iii) from 20:00 hours to 4:00 hours
Duration = 8.00 hours
(iv) from 17:00 hours to 5:15 hours
Duration = 12 hours 15 minutes
9. Vaigai Superfast Express (No. 12635)
(i) Time Vaigai Express starts from Chennai and arrive at Madurai?
Vaigai Express starts at 13:40 hours from Chennai and arrives at 21:20 hours at Madurai.
(ii) How many halts are there between Chennai and Madurai?
8 halts are there between Chennai and Madurai.
(iii) How long does the train halt at the Villupuram Junction?
15:55 − 15:50 = 5 minutes
(iv) At what time does the train come to Sholavandan?
20:34 hours.
(v) Find the journey time from Chennai Egmore to Madurai?
Total journey time = 7 hours 40 minutes
10. Manickam Practice Days Calculation
Joined: 20.02.2017 (Practice for 20 days). Continued from 10.07.2017 to 31.03.2018.
August … 31
September … 30
October … 31
November … 30
December … 31
January … 31
February … 28 (2018 is ordinary year)
March … 31
Total Second phase: 265 days
First phase (from 20-02-2017): 20 days
Total number of days practiced: 285
11. Clock Gain Problem
Gains 3 minutes every hour. Set correctly at 5 a.m. Time at 7 p.m?
Duration = 14 hours.
Gain = 14 × 3 minutes = 42 minutes.
At 7 p.m the clock shows 7:42 p.m.
12. Days between Republic day and Kalvi Valarchi Day in 2020
Republic day: Jan 26 | Kalvi Valarchi Day: July 15
February … 29 (2020 is leap year)
March … 31
April … 30
May … 31
June ... 30
July ... 15
Total number of Days: 172
13. Day Calculation
If 11th Jan 2018 is Thursday, what is 20th July?
190 ÷ 7 = 27 weeks + 1 day.
Next day of Thursday is Friday.
July 20th is Friday.
14. Conversions
(i) 480 days into years:
480 days = 1 year 3 months 25 days
(ii) 38 months into years:
38 months = 3 years 2 months
15. Age Calculation (as on 01.06.2018)
DOB: 01.01.2006
My age is 12 years 5 months 1 dayObjective Type Questions
16. 2 days = ——— hours.
a) 38 | b) 48 | c) 28 | d) 4017. 3 weeks = ——— days
a) 21 | b) 7 | c) 14 | d) 2818. Number of ordinary years between two consecutive leap years is ——————
a) 4 years | b) 2 years | c) 1 year | d) 3 years19. What time will it be 5 hours after 22:35 hours
a) 2:30 hours | b) 3:35 hours | c) 4:35 hours | d) 5:35 hours20. 2 ½ years is equal to —————— months.
a) 25 | b) 30 | c) 24 | d) 5ANSWERS SUMMARY: Exercise 2.2
1. i) 10:15, ii) 6:45, iii) 4:10, iv) 3:30, v) 9:40
2. i.d, ii.e, iii.b, iv.c, v.a
3. i) 1200s, ii) 20140s, iii) 210m, iv) 9h40m, v) 7h
4. 11h 5m 25s | 5. 1h 58m 5s
6. 2am, 8:45am, 9:10pm, 11:20am, 12mid
7. 3:15h, 12:35h, 12:00h, 00:00h
8. i) 7h10m, ii) 8h55m, iii) 8h, iv) 12h15m
9. i) 13:40/21:20, ii) 8, iii) 5m, iv) 20:34, v) 7h40m
10. 285 days | 11. 7:42 | 12. 172 days | 13. Friday
14. i) 1y 3m 25d, ii) 3y 2m
16. b | 17. a | 18. d | 19. b | 20. b