Question

please someone solve this ​

Answer 1

Question

In Amar's factory 216 machine parts are made in 3 days. Let's calculate how many machine parts will be made in 7 days.

Answer in Step-by-Step

Number of machine parts made in 3 days ⇒ 216

Number of machine parts made in 1 day ⇒ $\sf \frac{216}{3}$

⇒ 72

Number of machine parts made in 7 days ⇒ $\sf 72\times 7$

⇒ 504

∴Amar's factory produces 504 machine parts in 7 days.

Additional Information

Unitary Method:

In this method, we find the value of one unit and using this value we find the values of the required numbers.

For example ⇒

The cost of 5 pens is 25. Find the cost of 9 such pens.

Answer:

Cost of 5 pens ⇒ 25

Cost of 1 pen ⇒ 25÷5 = 5

Cost of 9 pens ⇒ 5×9 =45

Let's try one more question.

Mia purchased 10 books for ₹150 and Manish purchased 7 books for ₹84. So who got the books at a cheaper cost?

Answer:

Amount Mia paid for 10 books ⇒ ₹150

Amount Mia paid for 1 book ⇒ 150÷10 = ₹15

Hence, Mia paid ₹15 for one book.

Amount Manish paid for 7 books ⇒ ₹84

Amount Manish paid for 1 book ⇒ 84÷7 = ₹12

Hence, Manish paid ₹12 for one book.

₹15 > ₹12

∴Manish bought the books for a cheaper cost.