Question

Nagma runs around a rectangular park 180m long 120m wide at the rate of 7.5 km/hour.In how much time will she complete 5 rounds

Answer 1

Answer:

Perimeter=2(l+b) = 2(180+120)

= 2x3oo=600m

5 rounds=600x5=3000m

distance=3ooom=3km

speed=7.5km/hr

time required=3/7.5=30/75

=O.4 hr = o. 4x60 min = 24 min

Answer 2

Answer:

perimeter = 2(l+b)

= 2 ( 180+ 120)

= 2 × 300

= 600m

5 round

= 600× 5

= 3000m

Distance

= 3000m = 3 km

speed= 7.5km/ h

time required = 3/ 7.5

= 30 / 75

= 0.4 hour

= 0.4×60min

=> 24 minute