Question

A man riding a bicycle, com-
95
pletes one lap of a circular field
along its circumference at the
speed of 79.2 km/hr in 2 min-
utes 40 seconds. What is the
area of the field?
1985600 sq.metre
(2) 848500 sq.metre
(3) 795600 sq.metre
(4) Cannot be determined
(5) None of these​

Answer 1

Answer:

985600 m²

Step-by-step explanation:

Given:

speed= 79.2 km/hr = 22 m/s

time= 2 min 40 s = 160 s

dist= speed x time

2 x 22/7 x r = 22 m/s x 160 s

r= 22 x 160 x 7/22 x 1/2

r= 560m [ radius ]

Area: (22/7 * r²)

22/7 * 560 *560 = 985600 m²