SSC Government Jobs Exams Numerical Ability Time Distance and Speed

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

Options
1) 8.5 km/hr
2) 10 km/hr.
3) 12.5 km/hr
4) 9 km/hr

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SSC Other Question

When a parallel white light falls on a convex
lens, the colour meeting the axis close to the
optical axis will be -
(A) Red
(B) Blue
(C) Violet
(D) All at the same point The average age of 36 students in a group is 14 years. When teacher's age is included to it, the average increases by one. Find out the teacher's age in years?

Options
1) 51 years
2) 49 years
3) 53 years
4) 50 years