I want clear answer for this question....
it's urgent help me
Answers
a) d=2.5cm
r=2.5/2=1.4cm
C of semicircle +diameter
=πr+d
=22/7×1.4+2.8
=7.2
b) C of a semicircle +3 sides of a rectangle
d = 2.8 cm
r=2.8/2=1.4cm
P=πr+1.5 cm+2.8+1.5
22/7×1.4+5.2
4.4+5.8
=10.2cm
d) C of semicircle +2 cm 2cm
πr+4 cm
22/7×14
4.4+4
=8.4
THE ANT HAS TO TAKE A LONGER ROUND ON FOOD PIECE (b)
Step-by-step explanation:
to find the answer we have to first find the perimeter of each figure.
a. circumference of half circle=πr
=22/7×2.8/2
=22/7×28/10×2
=4.4 cm
so, total perimeter of figure a.= 4.4+2.8
=7.2 cm
b.circumference of half circle=4.4cm(we have find in figure a.)
total perimeter of figure b.=4.4+1.5+1.5+2.8
=10.2 cm
c.circumference of half circle=4.4 cm
total perimeter of figure c.=4.4+2+2
=8.4 cm
half circumference of circle=2πr/2
=πr. as I have done it in equation.
for figure B. ant have to take longer round because it have more perimeter.
hope it helps you..
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