Question

what is the cost of 4 minute mobile phone call if the rate is ₹2 for each 30 second?​

Answer 1

Answer:

Sixteen rupees for 4 minutes

Answer 2

GivEn:

• Cost of 30 secs Mobile phone call = ₹2

To find:

• Cost of 4 minutes mobile phone call?

Solution:

• Let cost of 4 minutes mobile phone call be x.

Here,

• 30 seconds = ₹2

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« Now, By using proportion method,

As we know that,

• 4 minutes = 240 seconds

→ 30 : 2 : : 240 : x

→ 30x = 480

→ x = 480/30

→ x = 16

∴ Hence, 16 rupees is the cost of 4 minute mobile phone call.

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« Now, Let's verify,

• Putting the value of x in the equation "30x = 480"

→ 30x = 480

Taking LHS,

→ 30(16)

→ 480

LHS = 480

RHS = 480

LHS = RHS

∴ Hence, Verified!