यदि (y=90+ax) में (x=5) से (x=12) तक (y) (63) बढ़ता है, तो (a) क्या है?
If in (y=90+ax), (y) increases by (63) from (x=5) to (x=12), what is (a)?
Explanation opens after your attempt
C. (9)
Concept
The change in (x) is (7). From (7a=63), (a=9).
Why this answer is correct
The correct answer is C. (9). The change in (x) is (7). From (7a=63), (a=9).
Exam Tip
(x) में परिवर्तन (7) है। (7a=63) से (a=9) मिलता है।
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