Question

4 Mr. Amit can walk 8 km in 1 hour 20 minutes.
(a) How far does he go in :
(1) 10 minutes?
(ii) 30 seconds?
(b) How long will it take him to walk :
(1) 2500 m2
(ii) 6.5 km?





write in copy by showing cutting and divide
if you will answer i will mark you as brainlist​

Answer 1

⠀

$\large\bf\underline{question}$

Mr.Amit can walk 8km in 1 hour 20 mins.

(a)How far does he go in:

1) 10 minutes

2) 30 seconds

⠀

(b)How long will it take him to walk:

1) 2500 m

2) 6.5 km

$\large\bf\underline{solution}$

Amit walk 8 km in 1 hour 20 mins.

$or \: 1 \frac{1}{3} = \frac{4}{3} hours$

$\tt\purple{∴ \: speed \: = \frac{distance}{time}}$

$= \frac{8}{4} = \frac{8 \times 3}{4}$

$\tt\orange{=\:6\:km/h}$

(a) 1) distance covered in 10 minutes

$= \frac{6 \times 1000 \times 10}{60} = 1000m = 1km$

$\tt\underline\red{distance\: covered\:by\:amit\:in\:10\:mins\:is\:1km}$

2) Distance covered in 30 seconds

$= \frac{6 \times 1000 \times 30}{60 \times 60} = 50m$

$\tt\underline\red{distance\: covered\:by\:amit\:in\:30\: seconds\:is\:50m}$

(b) 1) time taken in 2500m

$= \frac{2500}{1000 \times 6}$$= \frac{5}{12} hours = \frac{5}{12} \times 60 = 25mins$

$\tt\underline\red{time\:taken\:by\:amit\:in\:2500m\:is\:25mins}$

2)time taken in 6.5 km

$= \frac{6.5}{6} = \frac{65}{60} hours$$= 1 \: hour \: 60 \: minutes$

$\tt\underline\red{time\:taken\:by\:amit\:in\:6.5\:km\:is\:1hr\:60minutes}$