Question

If the cost of painting one black-board is Rs.50, what will be the cost of painting 10
black-boards
(a) Rs.60
(b) Rs.500
(c) Rs.5000
(d) Rs.10

Answer 1

Given,

• The cost of a painting of one blackboard = Rs. 50

To find,

• We have to find the cost of painting 10 blackboards.

Solution,

We can simply find the cost of painting 10 blackboards by using the unitary method.

It is given that,

      Cost of a painting of one blackboard = Rs. 50

Then, the cost of a painting of 10 blackboards = 50*10

                                                                             = Rs.500

∴The cost of painting 10 blackboards is Rs. 500.

Hence, if the cost of painting one blackboard is Rs.50, then the cost of painting 10 blackboards is (b) Rs. 500.

Answer 2

Answer:

500

Step-by-step explanation:

the cost of one painting blackboard=50rs

the cost of 10 painting blackboard=10×50

=500rs