The maximum speed of a boat in still water is 27 km / h . Now this boat is moving downstream in a river flowing at 9 km / h . A man in the boat throws a ball vertically upwards with speed of 10 m / s . Range of the ball as observed by an observer at rest on the river bank, is cm . (Take g =10 m / s 2 )

Physics · Motion in Plane

JEE Main 2025 — 29 January, Morning Shift — Question 44

The maximum speed of a boat in still water is $27 \mathrm{~km} / \mathrm{h}$ .

Now this boat is moving downstream in a river flowing at $9 \mathrm{~km} / \mathrm{h}$ .

A man in the boat throws a ball vertically upwards with speed of $10 \mathrm{~m} / \mathrm{s}$ .

Range of the ball as observed by an observer at rest on the river bank, is $\qquad$ cm . (Take $\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}$ )

Numerical answer — enter this value.

$\overrightarrow{\mathrm{v}}_{\mathrm{b}}=9+27=36 \mathrm{~km} / \mathrm{hr}$ $\xrightarrow{\longrightarrow}$

$\overrightarrow{\mathrm{v}}_{\mathrm{b}}=36 \times \frac{1000}{36000}=10 \mathrm{~m} / \mathrm{sec}$

Answer key and solution verified before publishing.

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