5. A rectangular field is 72 m by 58 m. Amar walksround it at the rate

1.	5. A rectangular field is 72 m by 58 m. Amar walksround it at the rate of 3 km per hour. What timewill he take in taking 2 rounds.
Answer» The perimeter is 2(72+58) = 260m 260(3) = 780 m total distance = 0.78 km km/(km/hr) = hours 0.78/3 = 0.26 hours (0.26 hours)(60 min/hr) = 15.6 minutes (0.6 min)(60 sec/min) = 36 seconds 15 minutes 36 seconds

5. A rectangular field is 72 m by 58 m. Amar walksround it at the rate of 3 km per hour. What timewill he take in taking 2 rounds.

Answer»

The perimeter is 2(72+58) = 260m

260(3) = 780 m total distance = 0.78 km

km/(km/hr) = hours

0.78/3 = 0.26 hours

(0.26 hours)(60 min/hr) = 15.6 minutes

(0.6 min)(60 sec/min) = 36 seconds

15 minutes 36 seconds