Question

Martin is taking a test at school. His teacher gave him 1 hour and 15. minutes to complete the test. He has been taking the test for 54 minutes.
How many minutes does Martin have left to finish the test?
minutes

Answer 1

Answer:

Mean(Average) weight of a class = 48 kg

Total no. of students = 20 students

So,total weight of the class = Average * Total Quantity

=?(48 * 20) kg

=?960 kg

A/Q , Two students join the class

So,Weight of 1st student = 60 kg

Weight of 2nd student = 58 kg

Total weight of both of them = ( 60 + 58 ) kg = 118 kg

Now,

Total no. of students = 20 + 2 = 22 students

Total weight of class =

= Class weight + New students weight

=?960kg + 118kg

=?1078kg

Therefore,

Mean weight of class now =

=?22 students total weight / 22

=?1078 kg / 22

=?49 kg (Ans)

Thus , mean weight of class now = 49 kg (Ans)

Hope your doubts are clear.

Best wishes.

Regards,

Answer 2

Step-by-step explanation:

1 hour = 60 minutes

60+15-54=75-54=21 minutes left