1. STUDENT’S TASK
1.
Mr. Agus has a “tendon” to save water. The size of tendon like as in picture. He want to
paint his tendon. Before he paint it, he need to know the surface area of tendon. What is
the surface area of tendon?
Then, how much water can be saved in the tendon?
2.
Tia is going to have a birtdhday party. She will makes a
party hat in conical figure as shown in the picture on the
left. If the height of the hat is 16 cm and the radius is 12 cm,
how wide is the paper needed for one hat?
b.
“To celebrate the independences day, class IX-A
will bring „tumpeng‟. They make a tumpeng for 25
persons. they estimate for each person average
need 0,2 lrice. Calculate the height of the tumpeng
if they will bring the tumpeng in a circle place that
have diameter 6 dm”
10cm
1,5 m
1 m
0,5 m