Question

5 X 3 =15
1. Nagma can swim 100 metres in 3 minutes 15 seconds and Lata in 2 minutes 55
is faster and by how many seconds?​

Answer 1

Answer:

$\large\mathcal{\red{QUESTION :-}}$

Nagma can swim 100 metres in 3 minutes 15 seconds and Lata in 2 minutes 55

is faster and by how many seconds?

$\large\mathcal{\red{Answer :-}}$

Velocity of man =25 m/min when no stream and 20 m/min when there is water flow of speed x m/min.

Hence, 25²- x² = 20

∴x=15 m/min=0.25 m/s

Answer 2

GIVEN

• Nagma can swim 100 metres in 3 min 15 sec
• Lata can swim 100 metres in 2 min 55 sec

TO FIND

• DIFFERENCE OF TIME

SOLUTION

Nagma takes

• 3 min 15 sec
• 180 sec + 15 sec
• 195 sec

Lata takes

• 2 min 55 sec
• 120 sec + 55 sec
• 175 sec

DIFFERENCE

• 195 sec - 175 sec
• 20 sec

RESULTS

• Lata is 20 sec faster than Nagma