wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The area of a square field is 8 hectares. How long would a man take to cross it diagonally by waling at the rate of 4 km per hour?

Open in App
Solution

1 hectare = 0.01 km2
∴ 8 hectares = 0.08 km2
Area of the square field = 12d2 (where d is the diagonal of the square)
0.08=12d2d2=0.16d=0.4 km

Or,
d = 400 m

Now,

ā€‹Speed=4 km/h=4×10003600 =109m/sec

We know:
Speed=DistanceTime

109=400TimeTime=360 sec=36060=6 min

A man would take 6 minutes to walk across the field diagonally.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Circumference of Circle
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon