Question

6. A rectangular field is 72 m by 58 m. Amar walks
round it at the rate of 3 km per hour. What time
will he take in taking 2 rounds.
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Answer 1

Length=72m
Breadth=58
Perimeter=2(L+B)
2(72+52)
2x130
=260
Aman takes 2 rounds so, perimeter x 2 i.e.
260x2= 520
Time taken by aman per 3 km=1 hour
Time taken by aman per 520 km= 520/3
= 173.33km(approx.)

Answer 2

Answer:

10 minutes 24 seconds

Step-by-step explanation:

Amar walks 522 m in 1/3000 × 520

= 52/300

= 13/75

= 13/75 × 60 min

= 13/15 × 12 min

= 13/5 × 4 min

= 13×4/5 min

= 52/5 min

Again 1 minutes = 60 seconds

52/5 × 60 sec

52 × 12 sec

= 624 sec

1 minutes = 60 sec

624 sec = 624/60

= 10min 24 sec