The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is
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(251+252+253+254+255) is divided by
If tan 450=cot∅, then the value of ∅, in radians is
In ∆ABC, ∠A = 90°, AD ⊥ BC and AD = BD = 2 cm. The length of CD is
If the angles of a triangle are in the ratio of 2:3:4, then the difference of the measure of greatest angle and smallest angle is
If a+b+c = 6 and ab+bc+ca = 1, then the value of bc(b+c) + ca(c+a) +ab(a+b) +3abc is
If X=32, then the value of 27x3-54x2+36x-11 is
Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then average speed is