Q4. In each of the following, find the unknown variable.
(a) If u is directly proportional to t3, and u = 10 when t = 8, find u when t = 125.
(b) If z is directly proportional to the cube of s, and z = 64 when s = 8, find z when s = 6.
Answers
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Answer:
a) 100
b) 48
Step-by-step explanation:
a) u=10/ /=8
=1.25
t=125/ 1.25
=100
t=125, u=100.
b) z=64/s=8
=8
z/ s=6
6×8
=48
z=48, s=6.
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