A varies jointly as B and C; and A = 6 when B = 3, C = 2; find A when B = 5, C = 7.
Answer & explanation
Correct answer: option 2
I :- A = 6 , B = 3, C = 2,
⇒ A = B×C
Now,
B = 5 , C = 7, then
A = B×C
= 5 × 7
= 35
A varies jointly as B and C; and A = 6 when B = 3, C = 2; find A when B = 5, C = 7.
Correct answer: option 2
I :- A = 6 , B = 3, C = 2,
⇒ A = B×C
Now,
B = 5 , C = 7, then
A = B×C
= 5 × 7
= 35