Question

please write the correct answer its urgent​

Answer 1

Explanation:

(i)

Speed:5/2 m/min

Total distance covered:5/2×16

:40 m

Submarine is now 40 m below the surface of water.

(ii) Temperature was:10°c

Rate of decreasing:2½°c/hr

Temperature to decrease:10°c-(-8°c)

: 10°+8°

:18°c

Time taken:

18÷2½

18÷5/2

18×2/5

36/5

7 hr 12 minutes

(iii)

Length of rope:68 m

Number of pieces:

68÷4¼

68÷17/4

68×4/17

16 pieces