Question

3. 10 metres of cloth costs $42. How many
metres can be bought for 21?​

Answer 1

Answer:

88.2 metre

Step-by-step explanation:

metre of cloth that can be bought in $42= 10m

metre of cloth that can be bought in $1=

42/10

=$4.2

metre of cloth that can be bought in $21=

21x4.2

=88.2m

Answer 2

${ \boxed{{ \bf{ \pink {\dag{AnsWer}}}}}}$

★GIVEN:-

• 10m cost = $42

★TO FIND:-

• ?m can be bought for $21

★EXPLANATION:-

In these type of questions, we first find the cost for 1 m and then the asked metres. let's do this.

$: \implies \sf{Length \: \: costing \: \: rs. \: 1 \: \: = \frac{10}{42} }$

$: \implies \sf{Length \: \: costing \: \: rs. \: 21 \: \: = \frac{10}{42} \times 21 }$

${ \boxed{ \underline{ \star{ \purple{Length \: \: costing \: \: rs. \: 21 \: \: =5m}}}}}$

So, 5m can be bought for $21.