Question

5. A rectangular field is 90 m by 70 m. A man walks around it at the rate of 4
per hour. What time will he take in making 5 rounds ?
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Answer 1

Answer:

length of the rectangular field(l)=90m

breadth of the rectangular field (b)=70m

Perimeter of the rectangular field=2(l+b)=2(90+70)=320m

(S)Total length of the rectangular field covered in 5 rounds=5×320=1600m

Speed of the man(v)=4m/hr

Time taken by the man to complete 5 rounds=S/v= 1600/4 hours

Time taken = 400hours