Question

a field is rectangular is 90m×70m . A man walks found it at the rate of 4m per second . what time will he take in making 5 rounds ? ​

Answer 1

Step-by-step explanation:

GIVEN:

a field is rectangular is 90m×70m . A man walks found it at the rate of 4m per second . what time will he take in making 5 rounds ?

to find :

what time will he take in making 5 rounds ?

solution:

• Perimeter of the rectangle is 90 +90 + 70 +70 = 160 + 160 =320 m

• In km we have 320/ 1000 = 0.320 km

• because 1000m = 1 km

• So his speed = 4 km / hr = 4 km / 60 min = 1 km in 15 min. 5 rounds implies 5 (0.320) = 1.6 km So if 1 km is 15 min then 1.6 km

• 15 x 1.6 min = 24 min

• Hence the person takes 24 min.