Answer:
R = 42
Explanation:
given R is directly proportional to T , then the equation relating them is
R = kT ← k is the constant of proportion
to find k use the condition R = 60 when T = 10
60 = 10k ( divide both sides by 10 )
6 = k
R = 6T ← equation of proportion
when T = 7 , then
R = 6 × 7 = 42