√480 * ?2 = (17.89 ÷4.95) * (19.98 * √9800)

Direction: What value should come in the place of (?) in the following questions.

√480 * ?2 = (17.89 ÷4.95) * (19.98 * √9800)

A.            15

B.            18

C.            21

D.            12

E.            23

Sol:

√480 * ?2 = (17.89 ÷4.95) * (19.98 * √9800)

22 * ?2 = 18/5 * 20 * 99

? = 18