The top of a vertical fencepost is 3m, 12 cm (3 meters, 12 centimeters) above level ground. At 9 a.m., the shadow of the fencepost is 7m, 32 cm long. At the same time, the shadow of a nearby building is measured to be 97m, 40 cm long. How tall is the building, correct to the nearest cm?
I got
42m, 41 cm
is this correct?
2006-09-01 10:20:23 · 5 answers · asked by Olivia 4 in Science & Mathematics ➔ Physics
41meters and 51.4754 centimeters
2006-09-01 10:24:22 · answer #1 · answered by moose 1 · 1⤊ 0⤋
Wouldn't a simple ratio work?
3.12/7.32 = x/97.40, solve for x = 41.51 m
or 41 m 51 cm.
2006-09-01 17:27:22 · answer #2 · answered by p_rutherford2003 5 · 1⤊ 0⤋
i got 41m 51cm
2006-09-01 17:24:25 · answer #3 · answered by bretttwarwick 3 · 0⤊ 0⤋
No, the answer is 41m ,51cm.
2006-09-01 18:07:42 · answer #4 · answered by ~Toni~ 2 · 0⤊ 0⤋
(3.12/7.32)=(x/97.4)
cross-multiply
(3.12*97.4)=(7.32*x)
(303.888)=(7.32*x)
(303.888/7.32)=x
(41.514)=x
41m and 51cm
2006-09-01 17:36:02 · answer #5 · answered by Anonymous · 0⤊ 0⤋