Question

7.
If the weight of five sheets of paper is 20 g, how many sheets of the same paper
would weigh 2.5 kg?
8.
Reena types 600 words in four minutes. How much time will she take to type 3,150​

Answer 1

Answer: 21 mins

Step-by-step explanation:

4 mins = 600 words

? = 3150 words

3150×4÷600= 21 mins

Answer 2

Answer:

7.)

weight of 5 sheets = 20g

Then, 2.5 Kg = 2500g

So,

no.of sheets 5 x

this is case of direct variation,

2500/x = 20/5

2500/x = 4/1

it will cross multiply

4x = 2500

x = 2500/4

x = 625 sheets

Hence, 625 sheets of the same paper

would weigh 2.5 kg.

8.) Reena types 600 words in 4 minutes.

So,she types one word in 4/600=1/150 min.

Hence she types 3150 words in 3150×1/150=21 minutes.

So,she will take 21 minutes to type 1350 words.