Class 4th Rs Aggarwal Exercise 64

 

Prem sir

Class 4th Rs Aggarwal Exercise-64

1. How many minutes have passed from Clock A to Clock B?

• (a) Clock A: 3:10, Clock B: 3:35
  To find the difference:

  • Start from 3:10 and count to 3:35.
  • From 3:10 to 3:20 → 10 minutes.
  • From 3:20 to 3:35 → 15 minutes.
    Total: 10 + 15 = 25 minutes.

• (b) Clock A: 1:55, Clock B: 2:25

  • From 1:55 to 2:00 → 5 minutes.
  • From 2:00 to 2:25 → 25 minutes.
    Total: 5 + 25 = 30 minutes.

• (c) Clock A: 9:20, Clock B: 9:45

  • From 9:20 to 9:30 → 10 minutes.
  • From 9:30 to 9:45 → 15 minutes.
    Total: 10 + 15 = 25 minutes.

• (d) Clock A: 11:35, Clock B: 12:10

  • From 11:35 to 12:00 → 25 minutes.
  • From 12:00 to 12:10 → 10 minutes.
    Total: 25 + 10 = 35 minutes.

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2. How many minutes pass between:

• (a) 12 o’clock and quarter past 12

  • Quarter past 12 is 12:15.
  • From 12:00 to 12:15 → 15 minutes.

• (b) 4 o’clock and quarter to 5

  • Quarter to 5 is 4:45.
  • From 4:00 to 4:45 → 45 minutes.

• (c) Quarter past 6 and 10 minutes to 7

  • Quarter past 6 is 6:15, and 10 minutes to 7 is 6:50.
  • From 6:15 to 6:50 → 35 minutes.

• (d) Half past 10 and quarter past 11

  • Half past 10 is 10:30, and quarter past 11 is 11:15.
  • From 10:30 to 11:15 → 45 minutes.

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3. Amit took part in a cycle race. He started at 1:25 p.m. and finished at 1:50 p.m.

• From 1:25 to 1:50 → 25 minutes.

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4. Sajal started doing his homework at 4:35 p.m. and finished it at 5:15 p.m.

• From 4:35 to 5:00 → 25 minutes.
• From 5:00 to 5:15 → 15 minutes.
  Total: 25 + 15 = 40 minutes.

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5. A tap was opened into an empty tank at 9:20 a.m. The tank was full at 10:15 a.m.

• From 9:20 to 10:00 → 40 minutes.
• From 10:00 to 10:15 → 15 minutes.
  Total: 40 + 15 = 55 minutes.

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6. Calculate the time:

• (a) 6:00 a.m. to 10:40 a.m.

  • From 6:00 to 10:00 → 4 hours.
  • From 10:00 to 10:40 → 40 minutes.
    Total: 4 hours 40 minutes.

• (b) 9:25 a.m. to 1:40 p.m.

  • From 9:25 to 1:00 → 3 hours 35 minutes.
  • From 1:00 to 1:40 → 40 minutes.
    Total: 4 hours 15 minutes.

• (c) 6:23 a.m. to 3:07 p.m.

  • From 6:23 to 12:00 (noon) → 5 hours 37 minutes.
  • From 12:00 to 3:07 → 3 hours 7 minutes.
    Total: 5:37 + 3:07 = 8 hours 44 minutes.

• (d) 10:15 p.m. (one day) to 5:05 p.m. (next day)

  • From 10:15 p.m. to 12:00 midnight → 1 hour 45 minutes.
  • From 12:00 midnight to 5:05 p.m. → 17 hours 5 minutes.
    Total: 1:45 + 17:05 = 18 hours 50 minutes.

• (e) 7:55 a.m. (one day) to 4:20 a.m. (next day)

  • From 7:55 a.m. to 12:00 midnight → 16 hours 5 minutes.
  • From 12:00 midnight to 4:20 a.m. → 4 hours 20 minutes.
    Total: 16:05 + 4:20 = 20 hours 25 minutes.

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7. Tarun drove to his friend’s house. He left at 10:40 a.m. and reached at 2:25 p.m.

• From 10:40 to 2:00 → 3 hours 20 minutes.
• From 2:00 to 2:25 → 25 minutes.
  Total: 3:20 + 0:25 = 3 hours 45 minutes.

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8. A painting competition started at 11:45 a.m. and finished at 1:35 p.m.

• From 11:45 to 12:00 → 15 minutes.
• From 12:00 to 1:35 → 1 hour 35 minutes.
  Total: 0:15 + 1:35 = 1 hour 50 minutes.

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9. A school starts at 7:20 a.m. It works for 5 hours 20 minutes.

• Add 5 hours 20 minutes to 7:20 → 7:20 + 5:20 = 12:40 p.m.

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10. A train leaves Mumbai at 4:10 p.m. and reaches Surat after 2 hours 55 minutes.

• Add 2 hours 55 minutes to 4:10 →
  • 4:10 + 2:00 = 6:10.
  • 6:10 + 0:55 = 7:05 p.m.
    Train reaches Surat at 7:05 p.m.

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Let me know if you have any other questions! Study kunji  by Prem Sir